Search results
21 kwi 2012 · SELECT * FROM sys.indexes i JOIN sys.partitions p ON i.index_id = p.index_id JOIN sys.allocation_units a ON a.container_id = (CASE WHEN a.type IN (1, 3) THEN p.hobt_id WHEN a.type IN (2) THEN p.partition_id ELSE NULL END)
MySQL CASE expression is a control flow structure that allows you to add if-else logic to a query. Generally speaking, you can use the CASE expression anywhere that allows a valid expression e.g., SELECT, WHERE and ORDER BY clauses. The CASE expression has two forms: simple CASE and searched CASE.
If no when_value or search_condition matches the value tested and the CASE statement contains no ELSE clause, a Case not found for CASE statement error results. Each statement_list consists of one or more SQL statements; an empty statement_list is not permitted.
18 wrz 1996 · Insert the missing parts in the JOIN clause to join the two tables Orders and Customers, using the CustomerID field in both tables as the relationship between the two tables. Start the Exercise.
7 mar 2019 · I'm working in a project with MySQL and using stored procedures to make my SELECT queries, so all of them have this same structure: BEGIN. SELECT * FROM `foo` WHERE . CASE. WHEN `column_selector` IS NULL THEN 1 . WHEN `column_selector` = 1 THEN `foo`.`column_1` = `value` WHEN `column_selector` = 2 THEN `foo`.`column_2` = `value` END.
26 sty 2024 · This guide aims to walk you through the nuts and bolts of using CASE-WHEN statements in MySQL 8 through practical examples and scenarios, enhancing both simple and complex querying tasks. The CASE statement in MySQL acts like an IF-THEN-ELSE statement found in many programming languages. Its simplest form looks like this:
18 gru 2014 · Use outer joins on both tables and move the CASE inside your COUNT: ft1.task, COUNT(case ft1.id when 1 then p1.id when 3 then u1.id end) as count. Non-hits for the CASE will give a null id and won't be counted. Note: Table a1 is in your where clause, but doesn't seem to be a selected table.
