SELECT TOP 1 FROM articles_view WHERE 1=1 AND id = 18 ORDER BY id DESC这是在向网站上传东西时弹出来的 该怎样处理 新手小白一个
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SELECT TOP 1 FROM articles_view WHERE 1=1 AND id = 18 ORDER BY id DESC这是在向网站上传东西时弹出来的 该怎样处理 新手小白一个
SELECT TOP 1 FROM articles_view WHERE 1=1 AND id = 18 ORDER BY id DESC
这是在向网站上传东西时弹出来的 该怎样处理
新手小白一个
SELECT TOP 1 FROM articles_view WHERE 1=1 AND id = 18 ORDER BY id DESC这是在向网站上传东西时弹出来的 该怎样处理 新手小白一个
SELECT TOP 1 FROM articles_view WHERE 1=1 AND id = 18 ORDER BY id DESC
(1)、TOP 1 表标只从articles_view中取一条记录
(2)、1=1 就是如果WHERE后条件书写错误,它也能正常执行,就相当于SELECT TOP 1 * FROM articles_view ORDER BY id DESC ,多用于动态条件中,也就是如果你多个变量拼接成一句sql时,可能造成语法错误,这时就不能执行,加上后可避免.比如你的应该是SELECT TOP 1 * FROM.,少了个*号
(3)、取id=18的这条记录
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