sql case statement with nested select

( A girl said this after she killed a demon and saved MC). Is there a proper earth ground point in this switch box? 103, 3. In some situations, an expression is evaluated before a CASE expression receives the results of the expression as its input. In the first form of CASE, each condition is an expression that should evaluate to a BOOLEAN value (True, False, or NULL). In the above example CASE is NESTED inside another CASE statement: The system starts with executing the outer CASE. However, thats when youre working with PL/SQL. i have employee table with column id, name, dept, salary A common question on SQL CASE statements is if the database evaluates all of the conditions in the CASE statement, or does it stop after finding the first match? condN: A BOOLEAN expression. FROM customers This example shows a CASE statement within another CASE statement, also known as a nested case statement in SQL. How do you get out of a corner when plotting yourself into a corner. That is a big difference from 10 minutes on production. Find all tables containing column with specified name - MS SQL Server. The expression evaluated when the simple CASE format is used. I know you can use the CASE statement in either. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Its like a series of IF ELSE. We need to make an alias of the subquery because a query needs a table object which we will get from making an alias for the subquery. Syntax <case_expression> ::= <simple_case_expression> | <search_case_expression> <simple_case_expression> ::= CASE <expression> WHEN <expression> THEN . CASE WHEN Value_1 THEN Statement_1In the above example, the only operation performed by the system is checking if Case_Expression = Value_1. rev2023.3.3.43278. g.cell_id, Here is an example for a typical correlated subquery. This is a nonsensical example, but could you do something like this:? union all CASE WHEN MOD(yourcolumn, 2)=1 THEN yourcolumn ELSE null END AS oddvalue Each Boolean expression i.e. However, this is an optional part of the SQL CASE statement. It should have the same result, but its a bit cleaner and has less code. Can you please clarify what determines that? WHEN THEN Statement_2, E.g. When expression1 Then Result1. Oracle has a function called DECODE, which lets you check an expression and return different values. The system will print Visit Nearby Tourist Location if flight tickets are > $400, The system will print Visit Los Angeles if flight tickets are BETWEEN $0 AND $100, The system will print Visit New York if flight tickets are BETWEEN $101 AND $200, The system will print Visit Europe if flight tickets are BETWEEN $201 AND $400, If Tutorial_Name = SQL THEN update Tutorial_Name to Structured Query language, If Tutorial_Name = PL/SQL THEN update Tutorial_Name to Oracle PL/SQL, If Tutorial_Name = MSSQL THEN update Tutorial_Name to Microsoft SQL, If Tutorial_Name = Hadoop THEN update Tutorial_Name to Apache Hadoop. In SQL Server, the purpose of the CASE expression is to always return an expression. With Boolean_Expression_N, Search Case support any operation which results in a Boolean value. g.itcl_id = 163 Syntax: There can be two valid ways of going about the case-switch statements. INNER JOIN A001470.INDIVIDUOCUENTACLIENTE ICC In the future someone may add another name to the table so I can't use a Case statement with static names. Specifies the default expression; then_expression and else_expression should all be same type or coercible to a common type. expr A general expression. ON SUBSTRING(STPR_STATUSES.STUDENT_PROGRAMS_ID, 1, 7) = (MILITARY_ASSOC.ID) It also performs something called short-circuit evaluation for Simple CASE expressions. operators ( AND, OR ). To do this, you can replace your CASE statement with: CASE NUMEROTELEFONO Like Simple Case ELSE is optional in Search case as well. So, once a condition is true, it will stop reading and return the result. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? Lets Query Guru99 table to check the updated value: We can use CASE with Order By. Doesn't the inner select statement create a result set which the outer SELECT statement then queries? FROM ( value In the second form of CASE, each value is a potential match for expr. = What does this means in this context? : So, once a condition is true, it will stop reading and return the result. CASE WHEN THEN Statement_1 In above example, Boolean_Expression_1 can contain both equal to and not equal to operator like A = B, A != B. PROVINCIA A place where magic is studied and practiced? I'm just looking conceptually at referencing the CASE statement in the SELECT clause somewhere in the WHERE clause, or vice versa. The expression returned if no comparison operation evaluates to TRUE. WHERE cs.cell_id = g.cell_id Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Query 2: SEARCHED CASE with the ELSE option. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Make sure your alias is somewhat verbose too! The following examples use the CASE expression in an ORDER BY clause to determine the sort order of the rows based on a given column value. Within a SELECT statement, the CASE expression allows for values to be replaced in the result set based on comparison values. This EXISTS checks the existence of the rows returned by the sub query. You don't need it, it just makes the code harder to read. We will show you how to do it. sql statement, Incorrect syntax near update Select Case @location When 'MediaFiles' Then update tblMediaFiles set mdActive=1 When 'MediaFiles1' Then. CASE WHEN sub.product_theme = US Topo AND sub.itcl_id != 163 THEN 1 ELSE 0 END count_topo, GROUP BY dl_month How is Jesus " " (Luke 1:32 NAS28) different from a prophet (, Luke 1:76 NAS28)? ) SELECT columns, prod Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers), Styling contours by colour and by line thickness in QGIS, Partner is not responding when their writing is needed in European project application, Redoing the align environment with a specific formatting. cant i use case within case like below, it says column does not exsist? group by to_char(dldate,YYYY-MM))) d select d.seq, Historical Layer Type, Avg from Where does this (supposedly) Gibson quote come from? If Case_Expression does not match with Value_1, then Case_Expression is compared with Value_2 for equivalency. http://msdn.microsoft.com/en-us/library/ms181765.aspx, How Intuit democratizes AI development across teams through reusability. The CASE statement should let you do whatever you need with your conditions. In MS SQL, there are two types of CASE: Simple CASE and Searched CASE. However, SQL isnt like other programming languages. ORDER BY first_name, last_name; Again, I recognize you wouldn't write this exact query. SELECT What is the correct way to screw wall and ceiling drywalls? User-864238592 posted. When case-operand is not specified, when-condition is an sql-expression . Thanks, where ic.product_type in (Graphics) and ic.product_theme=US Topo) and Case Here are some examples of the SQL CASE statement in SELECT queries. Yes, you can use a CASE within CASE in SQL. Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. FROM graphics_download g ) sub2 WHEN MILITARY_STATUSES = DODAF, DODAG,DODAR,DODCG,DODMA,DODNA,DODNG Errors in evaluating these expressions are possible. SELECT The syntax of the SQL CASE expression is: The CASE statement can be written in a few ways, so lets take a look at these parameters. Appreciate your help with this. SQL Writing CASE WHEN Statements in SQL (IF/THEN) Becoming a Data Scientist 14.3K subscribers Subscribe 55K views 3 years ago Step-by-step tutorial shows you how to use the CASE WHEN. union all Its not procedural. Is it a bug? To view Transact-SQL syntax for SQL Server 2014 and earlier, see Previous versions documentation. Had an interesting discussion with a colleague today over optimizing case statements and whether it's better to leave a case statement which has overlapping criteria as individual when clauses, or make a nested case statement for each of the overlapping statements. If ELSE is not present and Case_Expression matches with none of the values, then. If this argument is omitted and no comparison operation evaluates to TRUE, CASE returns NULL. Depending upon Flight ticket value, one amongst the following result will be displayed: We can use CASE with UPDATE. The answer provided by Joe Stefanelli is already correct. CASE IF() and SWITCH() are two recommended functions for getting the same results as a CASE expression. Yes, you can use an SQL CASE in a WHERE clause. If you preorder a special airline meal (e.g. Notify me of follow-up comments by email. Query 2: SIMPLE CASE with the ELSE option. Thank you very much for your effort on this topic. from If no conditions are true, it returns the value in the ELSE clause. The examples below will show how this is done. SUM(count_scan_map) AS count_scan_map, By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. FROM MILITARY_ASSOC JOIN STPR_STATUSES [ ELSE else_expression ] END Parameters boolean_expression AND ic.product_theme IN (US Topo, Hist) Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? How do I align things in the following tabular environment? (in the example above, the case results are captured as prod ). Employees that have the SalariedFlag set to 1 are returned in order by the BusinessEntityID in descending order. ( How Intuit democratizes AI development across teams through reusability. CASE statement in SQL procedures CASE statements can be used to conditionally enter into some logic based on the status of a condition being satisfied. The simple CASE expression compares an expression to a set of simple expressions to determine the result. The data types of else_result_expression and any result_expression must be the same or must be an implicit conversion. And I had never used UNPIVOT. Why are non-Western countries siding with China in the UN? SQL executes innermost subquery first, then next level. How to follow the signal when reading the schematic? WHEN MILITARY_STATUSES (ANAVY,DODNA,FAMNA,RNAVY,VNAVY) Does a summoned creature play immediately after being summoned by a ready action? Description CASE clause uses a rule to return a specific result based on the specified condition, similar to if/else statements in other programming languages. Not the answer you're looking for? CASE Statement Frequently Asked Questions, Procedural Languages Have an IF Statement, The initial expression in a simple CASE statement. AND PERMIL_STATUSES.POS=1 Its SQL Server only. The following example uses the CASE expression to change the display of product line categories to make them more understandable. In the above example CASE is NESTED inside IFELSE statement: First, IF Statement will execute and if Case Condition in SQL server is False then ELSE statement will execute. I find that examples are the best way for me to learn about code, even with the explanation above. SQL until Tutorial_name matches with WHEN values. In the order specified, evaluates input_expression = when_expression for each WHEN clause. Reddit and its partners use cookies and similar technologies to provide you with a better experience. If there is no ELSE part and no conditions are true, it returns NULL. )CASE exits when first value/expresion is TRUE, and sometimes it goes through all values/expresions?! However, CASE is recommended for several reasons: In terms of performance, they are both very similar. This Values: Value_1, Value_2 Are compared with single CASE_Expression sequentially. (AVG(NULLIF(count_hist, 0))) AS avg_hist If you want to know more, just leave a comment below. Do I need a thermal expansion tank if I already have a pressure tank? A simple expression to which input_expression is compared when the simple CASE format is used. ) sub WHEN France THEN Europe To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You know how sometimes when you think about something your brain starts to go in circles? Statement(s) could not be prepared. group by to_char(dldate,YYYY-MM))) d THEN RES There is a way to do this though. Within a SELECT statement, the searched CASE expression allows for values to be replaced in the result set based on comparison values. Did any DOS compatibility layers exist for any UNIX-like systems before DOS started to become outmoded? CASE NUMEROMOVIL Select statement to find duplicates on certain fields, Calculate proper rate within CASE statement. Connect and share knowledge within a single location that is structured and easy to search. If flight tickets are less than $100, then I will visit Los Angeles. WHEN Value_1 THEN Statement_1, E.g. If so, it should be SELECT *, (CASE WHEN Add the comma after *. While using W3Schools, you agree to have read and accepted our. Theoretically Correct vs Practical Notation. ncdu: What's going on with this second size column? Hi, if I change your Simple CASE Statement example from above as followed: SELECT I want to document every case where in my "Status_W1" column it says "Not Trial+" and where my "Status_Now" column says "Trial+". For more information, please see our Can airtags be tracked from an iMac desktop, with no iPhone? The CASE expression can't be used to control the flow of execution of Transact-SQL statements, statement blocks, user-defined functions, and stored procedures. We can write this code using SQL IIF statement syntax as following. The CASE expression evaluates its conditions sequentially and stops with the first condition whose condition is satisfied. Thanks for contributing an answer to Stack Overflow! FROM table For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as , IN, WHERE, ORDER BY, and HAVING. Hi Gregg, yes you can use a CASE statement in both the SELECT and WHERE clauses if you wanted to. ELSE NUMEROTELEFONO Multiple queries in mysql to the information schema. Assumption: Assume that we have the table as Guru99 with two columns and four rows as displayed below: We will use Guru99 table in further examples, Query 1: SIMPLE CASE with the NO ELSE option. I have written a NESTED CASE statement in a SQL but when try running it, I'm getting the error as "missing keyword" Can someone help me in correcting this? Is it a bug? AND PERMIL_PRIMARY_FLAG=YES); Hi Deborah, I think this is because of the * character before the case. tsql : is it possible to do nested case statements in a select? STEP 2: Using C_ID of step 1 for finding S_ID. CASE By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Tutorial_name = SQL, is evaluated for TRUE/FALSE until first Boolean expression which evaluates to TRUE. Thats strange the second CASE is being ignored. in Margaret. To elaborate more, consider below example: Lets consider categorizing Condition and Action separately from the above example below: In the above example, we can see that the outcome of the different conditions is governing separate action. Not the answer you're looking for? SELECT x WHEN Canada THEN 2 the value in the ELSE clause. If they all are numeric, then the database will determine which argument has the highest numeric precedence, implicitly convert the remaining argument to that data type, and return that datatype. Why is this sentence from The Great Gatsby grammatical? CALLENOMBRE AS CALLE, Well, you opened a way out. The code is very similar on both sides of the UNION ALL. SQL Server 2012 introduced a statement called IIF, which allows for an IF statement to be written. How do I UPDATE from a SELECT in SQL Server? DECODE is older, and CASE was made as a replacement for DECODE. To learn more, see our tips on writing great answers. Below is the example MS-SQL code: @Order is set to 1 and as first WHEN Boolean expression evaluates to TRUE, Tutorial_ID is selected for Order by Condition, Copyright - Guru99 2023 Privacy Policy|Affiliate Disclaimer|ToS, Difference between Simple and searched case, Oracle vs SQL Server Difference Between Them, What is SQL Server? OR :P835_STATE=% INNER JOIN A001470.INDIVIDUO I ON ICF.IDINDIVIDUO = I.IDINDIVIDUO It is saying that I am specifying more than one expression in the select list when not introduced with EXISTS. Hi Ben, If there is no ELSE part and no conditions are true, it returns NULL. Does a barbarian benefit from the fast movement ability while wearing medium armor? select ename, job, sal, case -- Outer Case when ename like 'A%' then case when sal >= 1500 then 'A' -- Nested Case end when ename like 'J%' then case when sal >= 2900 then 'J' -- Nested Case end end as "Name-Grade" From Emp The answer is that it stops after the first match. THEN AF WHEN USA THEN North America This process of assessing Boolean_expression will continue until one of the Boolean_expression returns TRUE. Or, if youre just testing for NULL values, you could use COALESCE, which returns the first non-NULL expression in the list: COALESCE(NUMEROTELEFONO, NUMEROMOVIL, NUMEROTELEFONOCASA) AS TELEFONO. SELECT CASE WHEN score >= 60 THEN "passed" ELSE "failed" END AS result, COUNT(*) AS number_of . OR ( Returns result_expression of the first Boolean_expression that evaluates to TRUE. Is thatconnected with comparisson signs (=, ) or with CASE expresions types( SIMPLEvs.SEARCHED )? The following example uses the CASE expression to change the display of product line categories to make them more understandable. Mostly used when we use CASE in the select clause. They've been part of the SQL standard since 1992, although Oracle SQL didn't . CASE is one of the most powerful and more complex built-in expressions in Transact-SQL. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. Let us see an example. Ill demonstrate this using more examples later in this article. In MS SQL, there are two types of CASE. (select 4 seq,trunc(avg(count)) Avg from (select to_char(dldate,YYYY-MM), count(*) count However, a couple of functions come close. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Do new devs get fired if they can't solve a certain bug? Within a SELECT statement, a simple CASE expression allows for only an equality check; no other comparisons are made. order by 1. However, as I said, it is difficult. No problem Margaret, it was a good challenge for me! It gives the same result as the previous example though. WHEN Canada THEN North America THEN ANG The difference between the phonemes /p/ and /b/ in Japanese. Although not required, it is a good idea to have a Case Else statement in your Select Case block to handle unforeseen testexpression values. Case keyword is followed by the WHEN statement, and there is no expression between CASE and WHEN. Time arrow with "current position" evolving with overlay number. THEN NAVY WHERE STPR_STATUSES.POS=1 AND STPR_STATUS=A AND NOT EXISTS As an example, say we had a table with 2 integer fields, column a and column b. Find centralized, trusted content and collaborate around the technologies you use most. Hopefully my SQL query will clear up what I'm trying to do: SELECT dateOfBooking, amORpm, conferenceRoomID, noDelegates, cateringInfo, allergyInfo, specialAccessInfo, bottledWaterNeeded, projectorNeeded, lecternNeeded FROM ( SELECT * FROM dbo.tableBookingSlots WHERE bookingID . However, you can use a native SQL statement to achieve the same goal. : Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, My answer has a few different ways to write your statement that are correct. It includes equal and not equal to operator. This example shows what happens if there are records that match with multiple WHEN expressions. However, Oracle does not have this functionality. Could you test that the values in NUMEROTELEFONO are actually NULL? I think you need to add some selects before your sum subqueries. What happens here? in INNER JOIN A001470.DIRECCION D The CASE expression in the SET statement determines the value to display for the column ContactType based on the existence of the BusinessEntityID column in the Employee, Vendor, or Customer tables. ------+--------------------------------------------------+, ------+-----------------------------------------------------------------------------------------------+, PySpark Usage Guide for Pandas with Apache Arrow. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If these expressions are equivalent, the expression in the THEN clause will be returned. How can I explain to my manager that a project he wishes to undertake cannot be performed by the team? Structured Query Language (SQL) is used to manage data in a relational database management system (RDBMS). Hi sir i am Bujjibabu from india If dont mind I want Oracle projects sir please provide me for my practical sir. Your article is the most complete I have found on the internet discussing CASE. Let's illustrate with an example. SQL Server Case Statement. current_page_url ilike %optus.com.au/shop/deals-bundles% OR Am I missing something? NOMBRE, optN: An expression that has a least common type with expr and all other optN. How do I UPDATE from a SELECT in SQL Server? Hi Ben! how do i incorporate a nested if statement in a select clause of a sql query? E.g. T-SQL CASE Clause: How to specify WHEN NULL, OR is not supported with CASE Statement in SQL Server, TSQL CASE with if comparison in SELECT statement. Could you please tell me how to do this or where to start. (CASE error (incorrect syntax near CASE, expecting ( or SELECT) Why do small African island nations perform better than African continental nations, considering democracy and human development? AND cs.name LIKE %||:P835_STATE||% my question is if you want to put even and odd value in different column then how can i write the query. If there is no match found in any of the conditions, thats where the ELSE statement comes in. CASE statements themselves are not new; they have long been implemented in other programming languages. Because the subquery may be evaluated once for each row processed by the outer query, it can be slow. Your explanations are really helpfull but i still cant make work this query. You did it all without any UNIONs. WHEN USA THEN 1 NUMERODOCUMENTO AS DNI, Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Since your THEN and your ELSE branch are equal, you can just get rid of the CASE. E.g. We can see that the results show different values based on the nested CASE statement. >>I'm having trouble getting a CASE statement to work in a nested select.<< What trouble do you have? CASE A simplified example: SELECT col1, col2, col3, CASE WHEN condition THEN CASE WHEN condition1 THEN CASE WHEN condition2 THEN calculation1 ELSE calculation2 END ELSE CASE WHEN condition2 THEN calculation3 ELSE calculation4 END END ELSE CASE WHEN condition1 THEN CASE WHEN condition2 THEN calculation5 ELSE calculation6 END ELSE CASE WHEN condition2 . Conceptually, the subquery results are substituted into the outer query. Thanks for the comment. The SQL CASE Expression The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). (select 1 seq,trunc(avg(count)) Avg from (select to_char(dldate,YYYY-MM), count(*) count from GRAPHICS_DOWNLOAD g where itcl_id Thanks for the comment. The following example uses the CASE expression in an UPDATE statement to determine the value that is set for the column VacationHours for employees with SalariedFlag set to 0. Find all tables containing column with specified name - MS SQL Server, Partner is not responding when their writing is needed in European project application. if x.boy is not null then x.boy else if x.girl is not null then x.girl else if x.dog is not null then x.dog else x.cat SQL IIF Statement overview. 102 (Hint: Union Operator / Case Statement). Which IDE are you using? The expression returned when input_expression equals when_expression evaluates to TRUE, or Boolean_expression evaluates to TRUE. The statement returns the hourly rate for each job title in the HumanResources.Employee table. group by prod,purchase_flag On Contrary, SEARCH CASE example has no CASE Expression: Here, each WHEN statement has its Conditional Boolean expression. Its a common feature of many programming languages. The Boolean expression evaluated when using the searched CASE format. E.g., Visitor will perform the act of visiting New York only in the condition if the flight ticket is between $100 to $200. Can I tell police to wait and call a lawyer when served with a search warrant? SELECT ITEM ,DETAIL_LEVEL_DESC AS DESCRIPTION ,COMP_DETAIL_ID AS PROMO_ID ,CASE WHEN CHANGE_TYPE = 'N' THEN CASE WHEN INSTR (UPPER (DETAIL_LEVEL_DESC), 'S/P')!=0 THEN 'SPP' EXISTS The EXISTS keyword produces a Boolean value [TRUE/FALSE]. The following example displays the list price as a text comment based on the price range for a product. The value used in the ELSE statement is what is returned if no match is found. The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). how do i incorporate a nested if statement in a select clause of a sql query? The CASE expression goes through conditions and returns a value when the first condition is By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Applies to: END AS TELEFONO. Boolean_expression is any valid Boolean expression. Its set based. WHEN MILITARY_STATUSES (AARMY,DODAR,FAMAR,RARMY,VARM) INNER JOIN A001470.CUENTAFACTURACION CF If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail: W3Schools is optimized for learning and training. no it makes no sense, add tables and wanted result, which would make everything much clearer, How Intuit democratizes AI development across teams through reusability. whether CASE_Expression = VALUE_1, VALUE_2. In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. FROM cell_states cs ELSE NULL CASE can be nested in another CASE as well as in another IFELSE statement. Blocks can be nested - i.e., because a block is an executable statement, it can appear in another block wherever an executable statement is allowed. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. resN: Any expression that has a least common type with all other resN and def. Statements that include a subquery usually take one of these forms: Check for more subquery rules and subquery types. WHERE tl.service_id = sm.service_txn_id Select S_ID from STUDENT_COURSE where C_ID IN. ) More examples of Nested Subqueries. wo , last_chg, case. It checks the number of employees and determines if they have an odd or even number of employees. CASE is used within a SQL statement, such as SELECT or UPDATE. SELECT EMPNO, FIRSTNME, MIDINIT, LASTNAME, CASE WHEN EDLEVEL < 15 THEN 'SECONDARY' WHEN EDLEVEL < 19 THEN 'COLLEGE' ELSE 'POST GRADUATE' END FROM EMPLOYEE. We can nest CASE statements similar to nested ifs that we find in most programming languages. Msg 125, Level 15, State 4, Line 1. THEN DEP Staging Ground Beta 1 Recap, and Reviewers needed for Beta 2. how to get the distinct records based on maximum date? The CASE statement should exit when it reaches the first TRUE condition. ELSE Unknown : EXISTS ( CASE Col1 WHEN 1 THEN 11 WHEN 2 THEN 21 ELSE 13 END. first_name, last_name, country, Refresh the page, check Medium 's site status, or find something interesting to read.

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