Journey of Life: sqlite 3 string to integer conversion, similar to C function atoi

本文介绍了如何在SQLite中将字符串类型的字段转换为整数类型进行比较。通过使用CAST(expr AS type)函数,可以轻松实现这一转换,例如:将名为version的列中的字符串11转换为整数。

Journey of Life: sqlite 3 string to integer conversion, similar to C function atoi

sqlite 3 string to integer conversion, similar to C function atoi

In sqlite3, if you have a column defined as string, but you want to use it as integer when doing comparison, you can do the following to convert it.



CAST( expr AS type)



For example: you have a column named "version", and you stored value "11" in it. Now you can convert that to integer by doing:



Select * from mytable where CAST(version as integer)>=11;



Hope this helps you.
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