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15 wrz 2008 · If you need to write just one condition, then iif() is sufficient, however if you want to write multiple iif() conditions within one statement then you will have to use `case' statement as demonstrated in above responses. Here is an example for your reference.
28 maj 2024 · We can use either a CASE statement or an IIF() function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects such as SQL Server, MySQL, and PostgreSQL.
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'
20 sie 2024 · In this article, we’ll explore how to use the CASE statement with multiple conditions, providing simple examples that should work across most major relational database management systems (RDBMS s).
30 paź 2023 · It can be combined with other functions to mimic an SQL if statement in select, enabling you to specify various outcomes and choose among them based on a specified condition or index, thus making it possible to render results based on conditional logic directly within a SELECT statement.
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:
3 lip 2019 · You need to combine results from 2 separate rows, so you need either JOIN or INTERSECT or something similar: SELECT a.OrderId FROM OrdersTable AS a JOIN OrdersTable AS b ON a.OrderId = b.OrderId WHERE a.Product = 'ProductA' AND b.Product = 'ProductB' ; SELECT OrderId FROM OrdersTable WHERE Product = 'ProductA' INTERSECT SELECT OrderId FROM ...
