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SQL GROUP BY 語句

sql group by 語句

group by 語句用于結(jié)合聚合函數(shù),根據(jù)一個或多個列對結(jié)果集進行分組。

 

1. group by 語法

select column_name, aggregate_function(column_name)
from table_name
where column_name operator value
group by column_name;
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