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SQLite AVG 함수 통사론

기능: SQLite AVG 집계 함수는 특정 열의 평균을 계산합니다.

구문: ​​sqlite> SELECT avg(특정 데이터 열) FROM TABLENAME;

SQLite AVG 함수 예

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

实例:
sqlite> SELECT avg(salary) FROM COMPANY;
结果:
avg(salary)
----------------
37142.8571428572