php - 使用 LEFT JOIN pdo php mysql 更新

Question

我想同时更新多个表，所以我使用 LEFT JOIN 为我的更新创建一个查询。我尝试了 2 种方法来创建 LEFT JOIN，但都失败了。我看不出我在哪里犯了错误，所以我希望有人能够正确地剖析查询并指出错误。

我已经对查询应用了一些格式，这样我看起来比以前看起来更易读:

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 ");

更新

我正在使用第一个选项，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 'SET t2.id = '315-512-613-123V', SET t3.Bid = '315-512-613-123V', SE' at line 1'

Answer 1

我使用这个查询让它工作。

"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 "