Question

我有以下表格的查询：

UPDATE TableName SET some="1", fields="two" 
WHERE some_condition="true" 
IF @@ROWCOUNT=0 INSERT INTO TableName(some, fields) VALUES ("1", "two");

此查询是用MS SQL编写的，但我想将其翻译为MySQL。我找了几个说要用ROW_COUNT()替换@@ ROWCOUNT的裁判，但我不知道该怎么办。

如何将这样的查询从MS SQL转换为MySQL？

Answer 1

处理这种情况的更优雅的方式就像....

IF EXISTS(SELECT 1 FROM TableName WITH (UPDLOCK, HOLDLOCK) 
          WHERE some_condition= "true" )
   BEGIN
        UPDATE TableName 
           SET some    = "1"
             , fields = "two" 
        WHERE some_condition= "true" ;
   END
ELSE
   BEGIN
      INSERT INTO TableName(some, fields) VALUES ("1", "two");
   END

如何翻译UPDATE WHERE IF @@ ROWCOUNT == 0查询从MS SQL到MySQL？

1 个答案: