insert into select from where

"insert into" 是 SQL 指令，用来向表中插入新数据。

"select from" 是 SQL 指令，用来从表中查询数据。

"where" 是 SQL 指令，用来筛选符合条件的数据。

例如：

INSERT INTO table_name (column1, column2, column3)
SELECT column1, column2, column3
FROM another_table
WHERE some_column = some_value;

这条指令将另一个表中满足条件 "some_column = some_value" 的数据插入当前表中。

相关问题

insert into select

The INSERT INTO SELECT statement is used to insert data from one table into another table. The syntax for this statement is as follows:

INSERT INTO table_name (column1, column2, ...)
SELECT column1, column2, ...
FROM source_table
WHERE condition;

This statement will insert the selected data from the source_table into the specified columns of the destination table. The WHERE condition is optional and can be used to filter the data being inserted.

For example, if we have a table called "customers" with columns "id", "name", "email", and "phone", and we want to insert all the data from this table into another table called "new_customers" but only for customers with email ending in "@gmail.com", we can use the following statement:

INSERT INTO new_customers (id, name, email, phone)
SELECT id, name, email, phone
FROM customers
WHERE email LIKE '%@gmail.com';