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QUOTE

引用一个字符串以生成一个结果,该结果可以作为SQL语句中正确转义的数据值使用。

语法

QUOTE(<str>)

示例

SELECT QUOTE('Don\'t!');
+-----------------+
| QUOTE('Don't!') |
+-----------------+
| Don\'t! |
+-----------------+

SELECT QUOTE(NULL);
+-------------+
| QUOTE(NULL) |
+-------------+
| NULL |
+-------------+
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