Question

我有一个MSSQL查询，并希望将其转换为MySQL版本。但是我的控制台出错：

#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 'DECLARE @selectedTags TABLE (ID int) DECLARE @tagCount int INSER' at line 1

我的代码如下：

DECLARE @selectedTags TABLE (ID int)
DECLARE @tagCount int

INSERT INTO @selectedTags VALUES (1)
INSERT INTO @selectedTags VALUES (3)
INSERT INTO @selectedTags VALUES (5)

SELECT @tagCount = COUNT(*) FROM @selectedTags

SELECT
    P.ID
FROM Product P
JOIN ProductTag PT
    ON PT.ProductID = P.ID
JOIN @selectedTags T
    ON T.ID = PT.TagID
GROUP BY
    P.ID,
    P.Name
HAVING COUNT(PT.TagID) = @tagCount

Answer 1

Mysql中没有TABLE类型，你必须CREATE TEMPORARY TABLE并插入它。

仅在存储的例程中允许DECLARE 设置@tagCount只需使用

SELECT COUNT(*) INTO @tagCount FROM temp_table;

MSSQL到MYSQL的转换

1 个答案: