在SQL语句中使用IF或CASE with multiple条件的作用是根据不同的条件执行不同的操作或返回不同的结果。这些条件可以是基于列的值、函数的结果、逻辑表达式等。 使用IF语句可以根据条件执行不同的操作。IF语句的基本语法如下: 代码语言:txt 复制 IF condition THEN statement1; ELSE statement2; END IF; 其中,conditio...
SQL CASE statement with multiple conditions In case you need the result to satisfy multiple conditions, you can add those conditions to the T-SQL CASE statement and combine them with the AND operator: CASE expression WHEN condition1 AND condition2 THEN result1 ELSE result2 END ...
<result> is an arbitrary SQL expression: it can be a simple expression like a constant or column name, or also a complex SQL expression containing subqueries and, of course, nested case expressions. A case expression can contain several when-then pairs. This allows for multiple conditions even...
With the searched CASE expression, we can have multiple WHEN conditions: SELECT [BusinessEntityID],[JobTitle],[HireDate],Seniority=CASE WHENDATEDIFF(YEAR,[HireDate],GETDATE())>10 THEN'Longer than 10 years'WHENDATEDIFF(YEAR,[HireDate],GETDATE())=10 THEN'Exactly 10 years'WHENDATEDIFF(YEAR,[...
https://linuxhint.com/sql-case-statement/ This tutorial mainly focuses on building a nested case statement in conjunction with the WHEN clauses. Nested CASE WHEN Statements In SQL, we can use a set of nested CASE WHEN statements in SQL to evaluate the multiple conditions and return a differe...
WITH Data (value) AS ( SELECT 0 UNION ALL SELECT 1 ) SELECT CASE WHEN MIN(value) <= 0 THEN 0 WHEN MAX(1/value) >= 100 THEN 1 END FROM Data ; You should only depend on order of evaluation of the WHEN conditions for scalar expressions (including non-correlated sub-queries that re...
"EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have the same exposed names. Use correlation names to distinguish them" "No transaction is active." error when trying to send a transactional SQL statmen...
SQL中的CASE WHEN使用 Case具有两种格式。简单Case函数和Case搜索函数。 –简单Case函数 CASE sex WHEN ...
请注意，sql通常不考虑排序，因此结果可以按任何顺序返回，甚至可以使用order by，具有相同键的行可以是...
SELECT /* regular selection */ column_0 /* two simple case when statements */ ,CASE WHEN column_1 BETWEEN 0 AND 3 THEN column_2 ELSE NULL END AS column_1 ,CASE WHEN column_3 = '1' THEN 1 ELSE 0 END AS column_4 /* a case when with multiple options */ ,CASE WHEN column_5 ...