# Analysis Of Implicit Data Type Conversions (Continued...)

+ statement execution plans:


![left](./student-guide/diagram/01-16-1.png)

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(omitted)
Here, the k column of the t1 table is int type, and you can use k='1' (1 is a string) to query the index query normally. This time, the database implicitly converts the string on the right side of the equal sign expression to '1' —>1, and the optimizer selects the correct index.