插入和更新MySQL程序

Question

我需要一些幫助來在MySQL中創建一個程序。

我有兩個表：

1. 連接
2. connection_temporary

我想創建做了程序：

• 如果SELECT keyname FROM connection WHERE keyname NOT IN (SELECT keyname FROM connection_temporary)更新connection.connection_status離線
• 如果SELECT keyname FROM connection_temporary WHERE keyname NOT IN (SELECT keyname FROM CONNECTION)插入與connection_temporary的行內容

我怎樣才能做到這一點與connection_temporary的行內容

如果SELECT keyname, real_ip, virtual_ip, received_bytes, sent_bytes, connection_tstamp FROM connection_temporary WHERE keyname IN (SELECT keyname FROM CONNECTION)更新連接連接？

Answer 1

你應該張貼您的兩個表的模式，但是，你可以根據下面自己做一些嘗試：

DELIMITER $$ 
CREATE PROCEDURE `proc`() 
LANGUAGE SQL 
NOT DETERMINISTIC 
CONTAINS SQL 
SQL SECURITY DEFINER 
COMMENT '' 
BEGIN 
    UPDATE `connection` 
    SET `connection`.connection_status = 'offline' 
    WHERE NOT EXISTS(
     SELECT 1 
     FROM connection_temporary 
     WHERE connection_temporary.keyname = `connection`.keyname 
    ); 

    INSERT INTO `connection` (keyname, real_ip, virtual_ip, received_bytes, sent_bytes, connection_tstamp) 
    SELECT keyname, real_ip, virtual_ip, received_bytes, sent_bytes, connection_tstamp 
    FROM connection_temporary 
    WHERE NOT EXISTS(
     SELECT 1 
     FROM `connection` 
     WHERE connection_temporary.keyname = `connection`.keyname 
    ); 

    UPDATE `connection` 
    JOIN connection_temporary ON connection_temporary.keyname = `connection`.keyname 
    SET `connection`.keyname = connection_temporary.keyname 
    ,`connection`.real_ip = connection_temporary.real_ip 
    ,`connection`.virtual_ip = connection_temporary.virtual_ip 
    ,`connection`.received_bytes = connection_temporary.received_bytes 
    ,`connection`.sent_bytes = connection_temporary.sent_bytes 
    ,`connection`.connection_tstamp = connection_temporary.connection_tstamp; 
END 
$$ DELIMITER ;