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mysql COUNT() function

Chinese translationRecent Updates：2018-05-15 11:02:15

UK[kaʊnt] US[kaʊnt]

n.Total number; count; charges; argument

v. Count; calculate the total; count...; important

Third person singular: counts Plural: counts Present participle: counting Past tense: counted Past participle: counted

mysql COUNT() function Video explanation

mysql COUNT() function syntax

Function: Returns the number of rows matching the specified conditions.

Syntax: SELECT COUNT(*) FROM table_name

mysql COUNT() function example

//计算客户 "Carter" 的订单数
SELECT COUNT(Customer) AS CustomerNilsen FROM Orders WHERE Customer='Carter';

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