oracle同時向多表插入數據

單表插入以insert into開頭,不能有then into語句.

多表插入以insert first/all 開頭,可以有then into語句

 

在Oracle操作過程中經常會遇到同時向多個不同的表插入數據，此時用該語句就非常合適。

All表示非短路運算，即滿足了第一個條件也得向下執行查看是否滿足其它條件，而First是短路運算找到合適條件就不向下進行。

INSERT ALL
WHEN prod_category=’B’ THEN
INTO book_sales(prod_id,cust_id,qty_sold,amt_sold)
VALUES(product_id,customer_id,sale_qty,sale_price)
WHEN prod_category=’V’ THEN
INTO video_sales(prod_id,cust_id,qty_sold,amt_sold)
VALUES(product_id,customer_id,sale_qty,sale_price)
WHEN prod_category=’A’ THEN
INTO audio_sales(prod_id,cust_id,qty_sold,amt_sold)
VALUES(product_id,customer_id,sale_qty,sale_price)
SELECT prod_category ,product_id ,customer_id ,sale_qty
,sale_price
FROM sales_detail;

 

Merging Rows into a Table

 

MERGE INTO oe.product_information pi
USING (SELECT product_id, list_price, min_price
FROM new_prices) NP
ON (pi.product_id = np.product_id)
WHEN MATCHED THEN UPDATE SET pi.list_price =np.list_price
,pi.min_price = np.min_price
WHEN NOT MATCHED THEN INSERT (pi.product_id,pi.category_id
,pi.list_price,pi.min_price)
VALUES (np.product_id, 33,np.list_price, np.min_price);