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oracle数据库的as语句怎么写,oracle中create table with as和insert into with as语句

作者：小桥流水78 | 2024-07-19 19:47:30

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insert into with as select

oracle中create table with as和insert into with as语句

发布时间：2020-07-07 22:26:28

来源：51CTO

阅读：751

作者：天黑顺路

oracle支持使用with as 子句来创建表

语法：

create table table_name as

with clause_name as

(select query )

[, clause_name1 as

(select query ) ...]

select column1,...columnn from clause_name；

语法：

insert into table_name

with clause_name as

(select query )

[, clause_name1 as

(select query ) ...]

select column1,...columnn from clause_name；

例子：

--create with 语句

CREATE TABLE w_test_20 AS

WITH data_info_19 AS

(SELECT

NVL(ename,'unknow employee') AS ename,

DECODE(deptno,10,'ACCOUNTING',20,'RESEARCH',30,'SALES',40,'OPERATIONS','no this department') AS dname,

NVL(job,'unkown job') AS job ,

substr(to_char(hiredate,'yyyy-mm-dd'),1,7) AS hiredate,

CASE WHEN sal <= 1000 THEN 'D'

WHEN sal > 1000 AND sal <= 2000 THEN 'C'

WHEN sal > 2000 AND sal <= 3000 THEN 'B'

WHEN sal > 3000 THEN 'A'

ELSE 'unkown grade'

END AS grade,

ROUND(sal,2) AS sal,

FLOOR(nvl(comm,0)) AS comm,

NVL(sal,0)+NVL(comm,0) AS total_sal

FROM emp WHERE deptno IN

(SELECT DISTINCT deptno FROM dept))

SELECT * FROM data_info_19;

CREATE TABLE w_test_18 AS

WITH dept_info AS

(SELECT deptno AS deptno_1,dname FROM dept)

emp_info AS

(SELECT empno AS empno_1,ename,job,deptno FROM emp)

other_info AS

(SELECT empno,hiredate,NVL(sal,0)+NVL(comm,0) AS total_sal FROM emp )

SELECT * FROM dept_info d LEFT JOIN emp_info e ON d.deptno_1=e.deptno RIGHT JOIN other_info o ON e.empno_1=o.empno ;

INSERT INTO w_test_19