语法#

SELECT column1, column2, columnN
FROM table_name
WHERE [condition]

实例#

Selection_005.png

SELECT * FROM COMPANY WHERE AGE >= 25 AND SALARY >= 65000;
SELECT * FROM COMPANY WHERE AGE >= 25 OR SALARY >= 65000;
SELECT * FROM COMPANY WHERE AGE IS NOT NULL;
SELECT * FROM COMPANY WHERE NAME LIKE 'Ki%';
SELECT * FROM COMPANY WHERE NAME GLOB 'Ki*';
SELECT * FROM COMPANY WHERE AGE IN ( 25, 27 );
SELECT * FROM COMPANY WHERE AGE NOT IN ( 25, 27 );
SELECT * FROM COMPANY WHERE AGE BETWEEN 25 AND 27;
SELECT AGE FROM COMPANY WHERE EXISTS (SELECT AGE FROM COMPANY WHERE SALARY > 65000);
SELECT * FROM COMPANY WHERE AGE > (SELECT AGE FROM COMPANY WHERE SALARY > 65000);