sql statement about the pit of count and sum, be careful

Others 2020-10-26 14:24:49 views: null

执行：SELECT count(0),sum(rc) from tbname where false

got the answer:

count(0) sum(rc)

0 null

Was it unexpected? This is a pit, be careful

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Origin blog.csdn.net/xcg8818/article/details/109266581

sql statement about the pit of count and sum, be careful

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