..] multi_table_insert: { ALL { insert_into_clause [ values_clause ] [error_logging_clause] } | conditional_insert_clause } subquery conditional_insert_clause: [ ALL | FIRST ] WHEN condition THEN insert_into_clause [ values_clause ] [ error_logging_clause ] [ insert_into_clause [ ...
SQL> update (select empno,job,sal from emp) set sal=8000 where job=(select job from emp where empno=7788); update后接subquery,用于限制修改列。这里sal列和job列必须包含在subquery内,否则set sal=8000 和 where job=()就无法识别了。 下面的例子也类似,where 中限定sal和deptno, 那么在subquery中也...
mysql> insert into orders3(order_num,cust_id,order_date) values(20010,order_num*2,'2005-09-01 00:00:00'); #insert时,列和值一一对应就行。value可以放入表达式。 Query OK,1row affected (0.03sec) mysql>select*from orders3;+---+---+---+ | order_num | order_date | cust_id | +-...
If you want to specify literal values, then use SELECT * FROM Dual; as a subquery. The following INSERT ALL will insert three records to the Employee table, where each record has a different set of columns. SQL Script: Insert Multiple Records in Oracle Copy INSERT ALL INTO Employee(EmpId,...
Oracle prohibits any changes to the table or view that would produce rows that are not included in the subquery CHECK OPTION demo INSERT INTO ( <SQL_statement> WITH CHECK OPTION) VALUES (value_list); CREATE TABLE dept ( deptno NUMBER(2), ...
Delete rows by restricting a condition using a WHERE clause. If the WHERE clause is omitted, all the rows from the table would be deleted. postgres=#deletefromdepartmentswheredepartment_name ='HR'; Example 2 A subquery will retrieve an output first and then the WHERE co...
SUBQUERY:在SELECT或WHERE列表中包含了子查询 EXPLAIN SELECT * FROM a1 WHERE id = (SELECT id FROM a2 WHERE id = 1); 3.2.3 DERIVED 在FROM列表中包含的子查询被标记为DERIVED(衍生) MySQL会递归执行这些子查询, 把结果放在临时表里。 EXPLAIN
Oracle SQL-insert into select语句-错误 sql oracle subquery sql-insert 我想在另一个表中插入另一个语句。我写了下面的脚本,得到了一个错误。 我编写了实际的select语句,它自己工作,脚本如下: SELECT job_id FROM JOBS WHERE job_id IN ('AD_CMMS') 当我试图将insert into语句与select语句合并时出现问题...
Inserting data from a subquery into a table Subqueries are another option to insert multiple rows in SQL. They can be used as a data source in an INSERT INTO SELECT command. Subqueries are useful when we need more than one query to obtain the result we want, and each subquery returns a...
=,<,<=,>,>= or when the subquery is used as an expression • subquery in FROM must have an alias • Is there a performance difference between CTE , Sub-Query, Temporary Table or Table Variable? • How can I insert values into a table, using a subquery with mor...