Search results
SELECT CASE WHEN ColB = 'March' THEN (Select ColA FROM tablename WHERE ColB = 'January') END FROM tablename Or can be done without a CASE would be. SELECT (SELECT colA FROM tablename WHERE colB = 'January') FROM tablename WHERE colB = 'March' See example of second running here
15 wrz 2008 · The case statement is your friend in this situation, and takes one of two forms: The simple case: SELECT CASE <variable> WHEN <value> THEN <returnvalue> WHEN <othervalue> THEN <returnthis> ELSE <returndefaultcase> END AS <newcolumnname> FROM <table> The extended case:
7 gru 2023 · If you want to do if-else-then logic in select, where or anywhere else in a statement, you need a case expression. This is a series of when clauses that the database runs in order: For example, if you want to map exam correct percentages to grade letters according to these rules:
9 wrz 2019 · Works with just one or more columns: SELECT * FROM tableA AS a WHERE EXISTS ( SELECT 1 FROM tableB AS b WHERE a.[C1] = b.[D1] AND a.[C2] = b.[D2] --- AND a.[Cn] = b.[Dn] ) ;
2 cze 2023 · SQL CASE Statement Syntax. The syntax of the SQL CASE expression is: CASE [expression] WHEN condition_1 THEN result_1 WHEN condition_2 THEN result_2 ... WHEN condition_n THEN result_n ELSE result END case_name. The CASE statement can be written in a few ways, so let’s take a look at these parameters.
30 paź 2023 · WHERE (Department = 'IT' AND Salary > 60000) OR (Department = 'HR' AND Salary <= 60000); This query utilizes the WHERE clause with AND/OR operators as an SQL if statement in SELECT to combine multiple conditions, allowing the retrieval of specific records based on complex conditional logic. sql.
4 sie 2024 · In this article, we discussed various methods for implementing IF or IF-ELSE logic in an SQL WHERE clause. These methods include using CASE, Boolean Operators, IF () or IIF (), and CHOOSE () or ELT (). Moreover, we can use universal CASE statements to handle multiple different conditions with different outcomes.
