This Oracle tutorial explains how to use the Oracle/PLSQLCASE statementwith syntax and examples. Description The Oracle/PLSQL CASE statement has the functionality of an IF-THEN-ELSE statement. Starting in Oracle 9i, you can use the CASE statement within a SQL statement. Syntax The syntax for ...
SQL>show userUSER为"HR"SQL>SELECTfirst_name,last_name,department_id,2CASEdepartment_id3WHEN10THEN'Accounting'4WHEN20THEN'Sales'5WHEN30THEN'Finance'6ELSE'Other'7ENDdepartment_name8FROMemployees where rownum<2;FIRST_NAMELAST_NAMEDEPARTMENT_IDDEPARTMENT_NAME---Steven King90OtherSQL> ※测试使用的Orac...
3.DECODE() 函数 就是case 语句。 4、CASE 语句 搜索case表达式 例子: select e.employee_id, case when e.salary>=10000 then 'good' when e.salary>5000 and e.salary < 10000 then 'middle' else 'poor' end as salary_type from hr.employees e 结果: EMPLOYEE_ID SALARY_TYPE --- --- 100 g...
DECODE is considered the most powerful function in Oracle. Oracle 8i release introduced the CASE expression. The CASE expression can do all that DECODE does plus lot of other things including IF-THEN analysis, use of any comparison operator and checking multiple conditions, all in a SQL query i...
contains文本的select语句EN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...
1、如何将T-SQL CASE WHEN语句转换为Databricks sparkSQL2、如何将嵌套IFF语句重写为oracle case when语句3、C#,将case语句转换为yield语句 🐸 相关教程1个 1、SQL 入门教程 🐬 推荐阅读3个 1、C 语言中的 switch/case 语句 本文支持英文版本,如需查看请点击这里!
This Oracle tutorial explains how to use the Oracle INSERT statement with syntax, examples, and practice exercises. The Oracle INSERT statement is used to insert a single record or multiple records into a table in Oracle.
Oracle的CASE WHEN语法报ORA-00932错误 SELECT CASE WHEN dummy = 'x' THEN '-' ELSE 3 END FROM dual 1. 2. 3. 4. 5. 6. 上面SQL会报下面错误: ORA-00932: 数据类型不一致: 应为 CHAR, 但却获得 NUMBER 这是因为 THEN 后面是 CHAR 类型数据,而 ELSE 后面是 NUMBER 类型数据,数据类型不一致报错...
where子句中的条件书写顺序,基本上对sql性能没有影响。 6 条件分支 6.1 Case子句 CASE有两种表达式: 1、 简单case表达式,使用表达式确定返回值。 语法: CASE SELECTOR WHEN EXPRESSION_1 THEN STATEMENT_1; WHEN EXPRESSION_2 THEN STATEMENT_2; ... WHEN EXPRESSION_N THEN STATEMENT_N; ELSE STATEMENT_N+1;...
Oracle SQL CASE WHEN ORA-00932：不一致的数据类型：预期的CHAR得到了编号00932.00000-“不一致的数据...