oracleinsert忽略转义
嵌入方式如下。INSERT INTO target_table (col1, col2, col3)
SELECT col1,
col2,
col3
FROM source_table
WHERE condition;
其中的select可以使用单表，也可以使用多表，分别举例说明如下。
1. select中使用单表查询
下面了演示如何使用insert into select语句，首先创建一个名为sales的表。
CREATE TABLE sales (
customer_id NUMBER,
product_id NUMBER,
order_date DATE NOT NULL,
total NUMBER(9,2) DEFAULT 0 NOT NULL,
PRIMARY KEY(customer_id,
product_id,
order_date)
);
以下语句将orders和order_items表中的销售摘要插入到sales表中，参考以下实现语句 -
INSERT INTO sales(customer_id, product_id, order_date, total)
SELECT customer_id,
product_id,
order_date,
SUM(quantity * unit_price) amount
FROM orders
INNER JOIN order_items USING(order_id)
WHERE status = 'Shipped'
GROUP BY customer_id,
product_id,
order_date;
2. select中使用多表查询
假设只想将2017年的销售摘要数据复制到新表中。 为此，创建一个名为sales_2017的新表，使用Oracle INSERT INTO SELECT和WHERE子句将2017年的销售数据复制到sales_2017表中：
INSERT INTO sales_2017
SELECT customer_id,
product_id,
order_date,
SUM(quantity * unit_price) amount
FROM orders
INNER JOIN order_items USING(order_id)
WHERE status = 'Shipped' AND EXTRACT(year from order_date) = 2017
GROUP BY customer_id,
product_id,
order_date;
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