sum
English [s?m] US [s?m]
n. ??, ??
vt.& ??, ??;
SQLite SUM ?? ???
??: SQLite SUM ?? ??? ???? ?? ?? ??? ??? ? ????.
??: ??sqlite> SELECT sum(?? ??? ?) FROM TABLENAME;
SQLite SUM ?? ?
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