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Php sql查询在使用limit时返回错误_Php_Sql_Mysql - Fatal编程技术网
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Php sql查询在使用limit时返回错误

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Php sql查询在使用limit时返回错误,php,sql,mysql,Php,Sql,Mysql,为什么这个查询有效？我该怎么写呢 select * from tbl_content order by year desc where visible = '1' limit 0,30; WHERE子句位于ORDER BY之前 重写为： select * from tbl_content where visible = '1' order by year desc limit 0,30; WHERE子句位于ORDER BY之前 重写为： select * from tbl_content

为什么这个查询有效？我该怎么写呢

select * from tbl_content order by year desc where visible = '1' limit 0,30;
WHERE子句位于ORDER BY之前

重写为：

select * from tbl_content where visible = '1'  order by year desc limit 0,30;
WHERE子句位于ORDER BY之前

重写为：

select * from tbl_content where visible = '1'  order by year desc limit 0,30;