Oracle Function: Case and Decode CASE expression perform if-then-else logic in SQL without having to use PL/SQL. CASE works in a similar manner to DECODE(). CASE is ANSI-compliant. There are two types of CASE expressions: Simple case expressions use expressions to determine the returned valu...
这两种方式，可以实现相同的功能。简单Case函数的写法相对比较简洁，但是和Case搜索函数相比，功能方面会有...
In this example, if the comm column (which is the commision for an employee) has a 0 value, it will be returned as a NULL as shown in the sample output. The coalesce statement is a bit like the Oracle NVL function. Given an unlimited number of arguments, it will return the first no...
Oracle/ Oracle Database/ Release 21 SQL Language Reference CASEexpressions let you useIF...THEN...ELSElogic in SQL statements without having to invoke procedures. The syntax is: Description of the illustration case_expression.eps simple_case_expression::= ...
If you need to use this logic in many tables you could place it in a PL/SQL function. Then call this function in your SQL: FromOracle Database 23ai, theautomatic SQL transpilercan extract SQL expressions in PL/SQL. These are then part of the SQL statement, so at runtime it's a...
oracle case when in的用法 Oracle CASE WHEN IN 1.单条件判断 •语法:CASE WHEN列名IN (值1,值2, ...) THEN结果1 ELSE结果2 END •说明:在指定列名的值中,如果存在某个值和给定的值列表匹配,则返回结果1;如果没有匹配项,则返回结果2。
Note that we used theROUND() function to round the discount to two decimal places. Searched CASE expression The Oracle searchedCASEexpression evaluates a list of Boolean expressions to determine the result. The searchedCASEstatement has the following syntax: ...
1ORACLE中的CASE……WHEN这两种写法查询结果不一样,请问区别在哪里?A:select sum(case when a.city_id in (47,45,35,37,36) then1 else 0 end) 甘肃北部,sum(case when a.city_id in (34,33,32) then1 else 0 end) 甘肃东部,sum(case when a.city_id in (39,38,41) then1 else 0 end)...
Oracle CASE缺少"in“限制的右括号 在Oracle 数据库中,CASE 语句用于进行条件判断并返回相应的值。标准的 CASE 语句有两种形式:简单 CASE 表达式和搜索 CASE 表达式。它们都需要正确的括号使用来确保语法正确。 基础概念 简单CASE 表达式: 代码语言:txt 复制 CASE column_name WHEN value1 THEN result1 WHEN value...
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