update delete

delete using subquery.sql

@@ -0,0 +1,9 @@
+USE Study
+GO
+
+SELECT * FROM EMPTEST
+
+DELETE EMPTEST
+WHERE DNO = (SELECT DNO FROM DEPARTMENT WHERE DNAME = 'Accounting')
+
+SELECT * FROM EMPTEST

delete.sql

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+USE Study
+GO
+
+SELECT * FROM DEPTEST
+
+DELETE DEPTEST -- 모든 튜플 삭제
+
+SELECT * FROM DEPTEST
+
+SELECT * FROM EMPTEST
+
+DELETE EMPTEST
+WHERE SALARY < 400;
+
+SELECT * FROM EMPTEST
+

insert multi tuples.sql

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+USE Study
+GO
+
+CREATE TABLE DEPT01(
+	DNO INT,
+	DNAME VARCHAR(20),
+	ADDRESS VARCHAR(20),
+)
+
+INSERT INTO DEPT01
+VALUES
+	(200, 'dept001', 'seoul'),
+	(201, 'dept002', 'incheon')

insert test table.sql

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+USE STUDY
+GO
+
+CREATE TABLE EMPTEST(
+	ENO INT,
+	ENAME NVARCHAR(20),
+	JOB NVARCHAR(20),
+	MANAGER INT,
+	HIREDATE DATETIME,
+	SALARY INT,
+	COMMISSION INT,
+	DNO INT
+)

insert using subquery.sql

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+USE Study
+GO
+
+INSERT INTO EMPTEST
+	SELECT * FROM EMPLOYEE WHERE DNO = 30

insert.sql

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+USE Study
+GO
+
+INSERT INTO EMPTEST
+VALUES (50, '홍길동', 'staff', NULL, '2022-01-01', 500, 30, 10)
+
+INSERT INTO EMPTEST (ENO, ENAME)
+VALUES (51, '심청이')
+
+INSERT INTO EMPTEST
+VALUES (52, '임꺽정', NULL, NULL, NULL, NULL, NULL, NULL)

select into.sql

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+USE Study
+GO
+
+SELECT DNO, DNAME INTO DEPTEST
+FROM DEPARTMENT
+WHERE DNO = 30

table structure copy (select into).sql

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+USE Study
+GO
+
+-- 테이블 구조만 복사
+SELECT * INTO DEPT_COPY
+FROM DEPARTMENT
+WHERE 1 > 2 -- 항상 거짓이 되는 조건

table structure select.sql

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+USE Study
+GO
+
+SELECT * FROM DEPTEST
+
+EXEC sp_help DEPTEST

update by subquery.sql

@@ -0,0 +1,10 @@
+USE Study
+GO
+
+SELECT * FROM EMPTEST
+
+UPDATE EMPTEST
+SET MANAGER = (SELECT MANAGER FROM EMPLOYEE WHERE ENO = 101)
+WHERE ENO = 50
+
+SELECT * FROM EMPTEST

update multi properties.sql

@@ -0,0 +1,10 @@
+USE Study
+GO
+
+SELECT * FROM EMPTEST
+
+UPDATE EMPTEST
+SET SALARY = 300, COMMISSION = 50
+WHERE ENO = 51
+
+SELECT * FROM EMPTEST

update.sql

@@ -0,0 +1,15 @@
+USE Study
+GO
+
+SELECT * FROM EMPTEST
+
+UPDATE EMPTEST
+SET SALARY = SALARY * 1.1
+
+SELECT * FROM EMPTEST
+
+UPDATE EMPTEST
+SET JOB = 'staff'
+WHERE DNO = 30
+
+SELECT * FROM EMPTEST