insert into seclet

"insert into select" 是一种SQL语句，用于将一个表中的数据插入到另一个表中。它的语法如下：

INSERT INTO table_name1 (column1, column2, ...)
SELECT column1, column2, ...
FROM table_name2
WHERE condition;

其中，`table_name1` 是要插入数据的目标表，`table_name2` 是要从中选择数据的源表。`column1, column2, ...` 是要插入的目标表的列名，可以选择性地指定。`condition` 是可选的筛选条件，用于选择源表中的特定行。

使用 "insert into select" 语句时，首先从源表中选择符合条件的数据，然后将这些数据插入到目标表中的指定列中。

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INSERT INTO select

INSERT INTO SELECT是一种SQL语句，用于将一个表中的数据插入到另一个表中。它的语法如下：

INSERT INTO table_name1 (column1, column2, ...)
SELECT column1, column2, ...
FROM table_name2
WHERE condition;

其中，table_name1是目标表，table_name2是源表。column1, column2等是目标表和源表中要插入的列名。condition是可选的，用于筛选源表中的数据。

INSERT INTO SELECT语句的工作原理是，它首先从源表中选择满足条件的数据行，然后将这些数据行插入到目标表中的指定列中。

insert into select

INSERT INTO SELECT is a SQL statement that allows you to insert rows into a table by selecting data from another table. It follows the syntax:

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

Here's an example to illustrate how it works:

Let's say we have two tables: `customers` and `new_customers`. We want to insert rows into the `customers` table by selecting data from the `new_customers` table.

INSERT INTO customers (customer_id, customer_name, email)
SELECT new_customer_id, new_customer_name, new_email
FROM new_customers
WHERE new_customer_status = 'active';

In this example, we are inserting rows into the `customers` table by selecting the `customer_id`, `customer_name`, and `email` columns from the `new_customers` table where the `new_customer_status` is 'active'.

Note that the column names and data types should match between the two tables for this operation to work correctly.