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mysql TOP statement

Chinese translationRecent Updates：2018-05-15 09:45:44

英[tɒp] 美[tɑ:p]

n. Top, top; (box) cover, (book pages, etc.) upper column; chief; top

adj. Highest of; top; first-class; the largest

vt. form the top; reach the top of...; be at the forefront of...; lead

vi. Summary; transcend; tower; end

Third person singular: tops Plural: tops Present participle: topping Past tense: topped Past participle: topped

mysql TOP statement Video explanation

mysql TOP statement syntax

Function: is used to specify the number of records to be returned.

Syntax: SELECT column_name(s) FROM table_name LIMIT number

Description: For large tables with thousands of records, TOP clauses are very useful.

Note: Not all database systems support the TOP clause.

mysql TOP statement example

//查询"persons"表中头5条数据
SELECT *FROM Persons LIMIT 5;
//从 "Persons" 表中选取 50% 的记录
SELECT TOP 50 PERCENT * FROM Persons;

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