sum
英[s?m]? ?美[s?m]??
n.金額;總數(shù);算術(shù);概略,重點(diǎn)
vt.& vi.歸納;總計;總結(jié),概括
SQLite SUM函數(shù) 語法
作用:SQLite SUM 聚合函數(shù)允許為一個數(shù)值列計算總和。
語法:sqlite>?SELECT?sum(某列資料)?FROM?TABLENAME;
SQLite SUM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 sum(salary) FROM COMPANY; 結(jié)果: sum(salary) ----------- 260000.0