count
英[ka?nt]? ?美[ka?nt]??
n.總數(shù);數(shù)數(shù);罪狀;論點(diǎn)
v.數(shù)數(shù);計(jì)算總數(shù);把…算入;重要
SQLite COUNT函數(shù) 語(yǔ)法
作用:SQLite COUNT 聚集函數(shù)是用來(lái)計(jì)算一個(gè)資料庫(kù)表中的行數(shù)。
語(yǔ)法:sqlite>?SELECT?count(*)?FROM TABLENAME;
SQLite COUNT函數(shù) 範(fàn)例
COMPANY 表 ID NAME AGE ADDRESS SALARY ---------- ---------- ---------- ---------- ---------- 1 Paul 32 California 20000.0 2 Allen 25 Texas 15000.0 3 Teddy 23 Norway 20000.0 4 Mark 25 Rich-Mond 65000.0 5 David 27 Texas 85000.0 6 Kim 22 South-Hall 45000.0 7 James 24 Houston 10000.0 實(shí)例:sqlite> SELECT count(*) FROM COMPANY; 結(jié)果: count(*) ---------- 7