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exists used count(1) #661

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wzhsh90 opened this issue Jul 23, 2022 · 0 comments
Open

exists used count(1) #661

wzhsh90 opened this issue Jul 23, 2022 · 0 comments

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@wzhsh90
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wzhsh90 commented Jul 23, 2022

SELECT count(1) AS _t FROM person_info_t WHERE (id=?) LIMIT 1

why not use

SELECT 1 AS _t FROM person_info_t WHERE (id=?) LIMIT 1
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