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17 lis 2015 · I am running a SELECT on two tables. I'll simplify it to the part where I'm having trouble. I need to modify the SELECT results to a certain format for a data import. My CASE statement works fine until I get to the point that I need to base the WHEN ... THEN... on a different table column.
15 wrz 2008 · From this link, we can understand IF THEN ELSE in T-SQL: IF EXISTS(SELECT * FROM Northwind.dbo.Customers WHERE CustomerId = 'ALFKI') PRINT 'Need to update Customer Record ALFKI' ELSE PRINT 'Need to add Customer Record ALFKI' IF EXISTS(SELECT * FROM Northwind.dbo.Customers WHERE CustomerId = 'LARSE') PRINT 'Need to update Customer Record LARSE ...
28 maj 2024 · In this article, we explored different options for executing IF-THEN logic in a SQL SELECT statement. These options include using CASE, IIF(), and CHOOSE(). Furthermore, if we want a query that’s used in almost every dialect, we must choose the CASE statement.
20 sie 2024 · The CASE statement in SQL is a conditional statement that allows us to specify conditions and return different values based on whether those conditions are met. There are two main forms of the CASE statement: Simple CASE: Compares an expression to a set of simple expressions to determine the result.
9 cze 2024 · In this article, we’ve explored the powerful SQL techniques of joining and using subqueries to retrieve complex and informative data from multiple tables. Additionally, we’ve demonstrated various types of joins, including INNER , LEFT , RIGHT , and FULL JOIN , with practical examples to illustrate their distinct use cases .
2 cze 2023 · You can probably write two CASE statements to display it: SELECT CASE WHEN MOD(yourcolumn, 2)=0 THEN yourcolumn ELSE null END AS evenvalue, CASE WHEN MOD(yourcolumn, 2)=1 THEN yourcolumn ELSE null END AS oddvalue FROM yourtable;
The IF...ELSE statement is a control-flow statement that allows you to execute or skip a statement block based on a specified condition. The IF statement. The following illustrates the syntax of the IF statement: IF boolean_expression . BEGIN . { statement_block } END Code language: SQL (Structured Query Language) (sql)
