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...
CASE With Multiple Conditions It is also possible to stack multiple conditions inside a singleCASEclause. Syntax SELECTcolumn1, column2, ...CASEWHENcondition1THENresult1WHENcondition2THENresult2-- Add more WHEN conditions and results as neededENDASalias_nameFROMtable_name; We can add as manyWHEN...
WHEN 1 THEN SELECT "One" WHEN 2 WHEN 3 THEN SELECT "Two or Three" ELSE SELECT "The number is outside range" CASE END; This gives a SQL syntax error. Thanks -- Jeff in Seattle Subject Written By Posted CASE with multiple consecutive WHEN(s) ...
SQL: Where子句中的case子句 where子句中的SQL between in case SQL CASE语句更改THEN子句中的列名 select子句中的SQL Server case语句 将变量添加到CASE语句中,然后输出 SQL查询的WHERE子句中的IF或CASE Join子句中的SQL Case表达式 在SQL语句中使用IF或Case with multiple 比较SQL case语句中的3个变量 CAST with...
SQL Server 具有多个WHEN值的CASE命令的SQL语法按照您所做的那样制定长查询，并将其与主查询进行CROSS ...
SQL CASE statement with Multiple THEN's I am wondering whether its possible to extract two seperate columns of data after a 'THEN' statement when using CASEFor exampleSelect country, CASE WHEN X>1 Then (code which allows 'A' in one column and 'B' in a second column)... END FROM ...
select sal, case when sal < 2000 then 'category 1' when sal < 3000 then 'category 2' when sal < 4000 then 'category 3' else 'category 4' end from emp; E.g.: The requirement is to find out the count of employees for various conditions as given below. There are multiple ways of...
"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...
In the tipSQL Server CASE Expression Overview, Aaron has written a section about data type precedence in the CASE expression. Nesting CASE Expressions With the searched CASE expression, we can have multiple WHEN conditions: SELECT [BusinessEntityID],[JobTitle],[HireDate],Seniority=CASE WHENDATEDIFF...
sql中的case when的功能是实现单列或者多列的条件统计，其实Pandas也可以实现的，比如万能的apply方法，...