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 e
当你在使用 CASE 语句时,如果缺少了右括号,Oracle 数据库会抛出语法错误。这是因为 SQL 语句需要成对的括号来定义语句的边界。 解决方法 确保每个 CASE 语句都有匹配的左括号和右括号。以下是一个正确的 CASE 语句示例: 代码语言:txt 复制 SELECT employee_id, first_name, last_name, CASE department_id WHEN...
WHEN column2 IN ('C', 'D') THEN 'Option 2' ELSE 'Other Option' END AS column3 FROM table1; ``` 在上面的例子中,根据column2的值,在column3中赋予不同的选项。 需要注意的是,字符串分割函数和CASE WHEN语句在Oracle中都是非常灵活和功能强大的,可以根据具体的需求进行适当的调整和组合使用。©...
To do this, ensure thesql_transpilerparameter ison(it'soffby default). When a function in thewhereclause is transpiled, you can see the case expression instead of the function in the predicate section of the plan: There are a few differences betweencasein PL/SQL andOracle SQL. Using ca...
oracle function中case when用法 在Oracle中,CASE WHEN函数可以用于条件判断和返回不同的值。 基本语法格式如下: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 ... ELSE result END 实际使用时,可以根据需要添加任意多个WHEN条件和对应的结果。如果没有满足条件的WHEN语句,可以使用ELSE语句设置...
createorreplacefunctionfn_teacher_tid(f_tidvarchar2)returnvarchar2--创建一个函数 传递一个varchar2类型的值 返回一个varchar2类型的值isf_resultvarchar2(50);--声明变量begin--开始书写函数内容iflength(f_tid)!=18thendbms_output.put_line('身份证格式不正确');elsedbms_output.put_line('身份证格式正确...
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::= ...
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。
-- 第二种使用with function 子句 with function get_level(P_SALARY in number) return varchar2 is begin return case P_SALARY WHEN >13000 THEN 'high' WHEN 9000, 12008 THEN 'normal' WHEN 4800,4200,6000 THEN 'low' ELSE 'executive pay' ...
Oracle Account Manage your account and access personalized content.Sign up for an Oracle Account Sign in to my Account Sign in to Cloud Access your cloud dashboard, manage orders, and more.Free Cloud Platform Trial Sign in to Cloud You are viewing an older release. ...