SQL - DML ( select, insert, update, delete)
1. INSERT 1 2 3 4 5 6 7 8 9 10 11 12 13 DROP TABLE TT; CREATE TABLE TT(SEQ NUMBER, VAL VARCHAR2(10)); -- DDL은 롤백XXXXX INSERT INTO TT(SEQ,VAL) VALUES(66,'육육'); INSERT INTO TT VALUES(66,'육육'); SELECT * FROM TT; -- null을 입력하는 방법 INSERT INTO TT VALUES(3, NULL); --- 널 INSERT INTO TT VALUES(4, ''); --- 널 INSERT INTO TT(SEQ) VALUES(77); --- 널 INSERT INTO TT VALUES(99, 'null'); INSERT INTO TT VALUES(88,..