用LEFT JOIN更新pdo php mysql

我想同时更新多个表，所以我使用LEFT JOIN为我的UPDATE创建单个查询。我尝试了2种方法使左连接，但都失败了。我没有看到我犯了什么错误，所以我希望有人能够正确剖析查询并指出错误。用LEFT JOIN更新pdo php mysql

我已经应用某些格式的查询，使我看起来可读比以前看：

首先是：

"UPDATE " 
. 
"table1 AS t1 SET t1.Bid = :id " 
. 
"LEFT JOIN table2 AS t2 SET t2.id = :id ON t1.Bid = t2.id AND t1.status = t2.status " 
. 
"LEFT JOIN table3 AS t3 SET t3.Bid = :id ON t1.Bid = t3.Bid AND t1.status = t3.status " 
. 
"LEFT JOIN table4 AS t4 SET t4.id = :id ON t1.Bid = t4.id AND t1.status = t4.status " 
. 
"LEFT JOIN table5 AS t5 SET t5.Bid = :id ON t1.Bid = t5.Bid AND t1.status = t5.status " 
. 
"LEFT JOIN table6 AS t6 SET t6.id = :id ON t1.Bid = t6.id AND t1.status = t6.status " 
. 
"LEFT JOIN table7 AS t7 SET t7.Bid = :id ON t1.Bid = t7.Bid AND t1.status = t7.status " 
. 
"LEFT JOIN table8 AS t8 SET t8.id = :id ON t1.Bid = t8.id AND t1.status = t8.status " 

. 
"WHERE t1.Bid = :oldid AND t1.status = :status "

第二个是：

$stmt = $dbh - > prepare("UPDATE " 
    . 
    "table1 AS t1 " 
    . 
    "LEFT JOIN table2 AS t2 ON t1.Bid = t2.id AND t1.status = t2.status " 
    . 
    "LEFT JOIN table3 AS t3 ON t1.Bid = t3.Bid AND t1.status = t3.status " 
    . 
    "LEFT JOIN table4 AS t4 ON t1.Bid = t4.id AND t1.status = t4.status " 
    . 
    "LEFT JOIN table5 AS t5 ON t1.Bid = t5.Bid AND t1.status = t5.status " 
    . 
    "LEFT JOIN table6 AS t6 ON t1.Bid = t6.id AND t1.status = t6.status " 
    . 
    "LEFT JOIN table7 AS t7 ON t1.Bid = t7.Bid AND t1.status = t7.status " 
    . 
    "LEFT JOIN table8 AS t8 ON t1.Bid = t8.id AND t1.status = t8.status " 
    . 
    " SET t1.Bid = :id, " 
    . 
    " SET t2.id = :id, " 
    . 
    " SET t3.Bid = :id, " 
    . 
    " SET t4.id = :id, " 
    . 
    " SET t5.Bid = :id, " 
    . 
    " SET t6.id = :id, " 
    . 
    " SET t7.Bid = :id, " 
    . 
    " SET t8.id = :id " 

    . 
    "WHERE t1.Bid = :oldid AND t1.status = :status ");

UPDATE

我使用的第一个选项，我得到：

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LEFT JOIN table2 AS t2 SET t2.id = '315-512-613-12' at line 1'

第二个获得：

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'SET t2.id = '315-512-613-123V', SET t3.Bid = '315-512-613-123V', SE' at line 1'

来源

2015-11-27 guradio

那么，有什么问题呢？请包括这两个请求的预期和实际结果。我相信**更新**多个表的Mysql语法是'UPDATE t1，t2，t3 SET t1.field1 = value1，t2.field2 = value2 ... WHERE t1.pk = t2.fk ...' –

Check执行查询时由MySQL返回的错误。 – Jocelyn

@AlexBlex我期望它更新，但我得到错误..我会检查错误，并将其粘贴在更新..我不需要使用左连接是你的意思？但如果具体的ID不存在这意味着它不会被更新，这就是为什么我使用'LEFT JOIN'的原因之一 – guradio

I had it working using this query.

"UPDATE 
    table1 AS t1 LEFT JOIN 
    table2 AS t2 ON t1.Bid = t2.id AND t1.status = t2.status LEFT JOIN 
    table3 AS t3 ON t1.Bid = t3.Bid AND t1.status = t3.status LEFT JOIN 
    table4 AS t4 ON t1.Bid = t4.id AND t1.status = t4.status LEFT JOIN 
    table5 AS t5 ON t1.Bid = t5.Bid AND t1.status = t5.status LEFT JOIN 
    table6 AS t6 ON t1.Bid = t6.id AND t1.status = t6.status LEFT JOIN 
    table7 AS t7 ON t1.Bid = t7.Bid AND t1.status = t7.status LEFT JOIN 
    table7 AS t8 ON t1.Bid = t8.id AND t1.status = t8.status 
    SET t1.Bid = :id, 
     t2.id = :id, 
     t3.Bid = :id, 
     t4.id = :id, 
     t5.Bid = :id, 
     t6.id = :id, 
     t7.Bid = :id, 
     t8.id = :id 
    WHERE t1.Bid = :oldid 
    AND t1.status = :status "

来源

2015-11-28 03:39:25 guradio

用LEFT JOIN更新pdo php mysql

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