大虾！！帮帮忙！！查询问题！！

如果要查询的字符串中有引号怎么办？？？
例如：
SELECT * FROM tx WHERE Name='aa'aa'

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SELECT * FROM tx WHERE Name='aa''aa'
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select ''''
select ''''''
select char(39)
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SELECT * FROM tx WHERE Name='aa''aa'

'' 表示'
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SELECT * FROM tx WHERE Name='aa''aa'