diff --git a/between, in, is null, like, order by.sql b/between, in, is null, like, order by.sql
new file mode 100644
index 0000000..ad1b9c9
--- /dev/null
+++ b/between, in, is null, like, order by.sql	
@@ -0,0 +1,30 @@
+USE Study
+GO
+
+-- BETWEEN
+SELECT * FROM EMPLOYEE
+WHERE SALARY BETWEEN 400 AND 600
+
+-- IN
+SELECT ENAME, JOB FROM EMPLOYEE
+WHERE JOB IN ('section', 'senior')
+
+-- IS NULL
+SELECT * FROM EMPLOYEE
+WHERE COMMISSION IS NOT NULL
+
+-- LIKE
+-- %: ÀÓÀÇ ±æÀÌ ¹®ÀÚ¿­, _: ÇѱÛÀÚ ¹®ÀÚ
+SELECT * FROM DEPARTMENT
+WHERE DNAME LIKE 'H%n'
+
+
+-- ORDER BY
+SELECT ENAME, SALARY, DNO
+FROM EMPLOYEE
+ORDER BY SALARY DESC
+
+-- ORDER BY (´ÙÁß ¼Ó¼º Á¤·Ä), TIE BREAK
+SELECT ENAME, SALARY, DNO
+FROM EMPLOYEE
+ORDER BY SALARY DESC, DNO ASC
\ No newline at end of file
diff --git a/distinct.sql b/distinct.sql
new file mode 100644
index 0000000..18edadb
--- /dev/null
+++ b/distinct.sql
@@ -0,0 +1,6 @@
+USE Study
+GO
+
+SELECT JOB FROM EMPLOYEE
+
+SELECT DISTINCT JOB FROM EMPLOYEE
\ No newline at end of file
diff --git a/search sample data generation.sql b/search sample data generation.sql
new file mode 100644
index 0000000..0ef337c
--- /dev/null
+++ b/search sample data generation.sql	
@@ -0,0 +1,43 @@
+USE master
+GO
+CREATE DATABASE Study -- MagicCorp Database
+GO
+
+ALTER DATABASE Study -- MagicCorp Database
+SET RECOVERY FULL
+GO
+
+USE Study -- MagicCorp Database
+GO
+CREATE TABLE DEPARTMENT( 
+DNO INT PRIMARY KEY,
+DNAME VARCHAR(20), LOC VARCHAR(20)
+)
+CREATE TABLE EMPLOYEE(  
+ENO INT PRIMARY KEY,
+ENAME NVARCHAR(20), JOB NVARCHAR(20),
+MANAGER INT, HIREDATE DATETIME,
+SALARY INT, COMMISSION INT,
+DNO INT REFERENCES DEPARTMENT(DNO)
+)
+CREATE TABLE SALGRADE(   
+GRADE INT PRIMARY KEY IDENTITY,
+LOWSAL INT, HIGHSAL INT
+)
+INSERT INTO DEPARTMENT VALUES(10, 'Accounting', 'Seoul'); INSERT INTO DEPARTMENT VALUES(20, 'Human', 'Incheon');
+INSERT INTO DEPARTMENT VALUES(30, 'Sales', 'Yungin'); INSERT INTO DEPARTMENT VALUES(40, 'Computing', 'Suwon');
+
+INSERT INTO SALGRADE VALUES(901, 1000); INSERT INTO SALGRADE VALUES(501, 900);
+INSERT INTO SALGRADE VALUES(401, 500);  INSERT INTO SALGRADE VALUES(301, 400)
+INSERT INTO SALGRADE VALUES(201, 300)
+
+INSERT INTO EMPLOYEE VALUES(101, 'e1', 'staff', 113, '2007-03-01', 300, NULL, 20)
+INSERT INTO EMPLOYEE VALUES(102, 'e2', 'deputy', 105, '2007-04-02', 250,   80, 30)
+INSERT INTO EMPLOYEE VALUES(103, 'e3', 'section', 105, '2005-02-10', 500,  100, 30)
+INSERT INTO EMPLOYEE VALUES(104, 'e4', 'chief', 108, '2003-09-02', 600, NULL, 20)
+INSERT INTO EMPLOYEE VALUES(105, 'e5', 'section', 105, '2005-04-07', 450,  200, 30)
+INSERT INTO EMPLOYEE VALUES(106, 'e6', 'chief', 108, '2003-10-09', 480, NULL, 30)
+INSERT INTO EMPLOYEE VALUES(107, 'e7', 'chief', 108, '2004-01-08', 520, NULL, 10)
+INSERT INTO EMPLOYEE VALUES(108, 'e8', 'senior', 103, '2004-03-08', 500,    0, 30)
+INSERT INTO EMPLOYEE VALUES(109, 'e9', 'ceo', NULL, '1996-10-04',1000, NULL, 20)
+INSERT INTO EMPLOYEE VALUES(110, 'e10', 'section', 103, '2005-04-07', 500, NULL, 10)
\ No newline at end of file
diff --git a/select as.sql b/select as.sql
new file mode 100644
index 0000000..0902c79
--- /dev/null
+++ b/select as.sql	
@@ -0,0 +1,6 @@
+USE Study
+GO
+
+SELECT ENAME, SALARY * 12 FROM EMPLOYEE
+
+SELECT ENAME, SALARY * 12 AS YEARSALARY FROM EMPLOYEE
diff --git a/select simple.sql b/select simple.sql
new file mode 100644
index 0000000..0e6beec
--- /dev/null
+++ b/select simple.sql	
@@ -0,0 +1,6 @@
+USE Study
+GO
+
+SELECT DNO, DName, LOC FROM DEPARTMENT
+
+SELECT * FROM DEPARTMENT
\ No newline at end of file
diff --git a/select where.sql b/select where.sql
new file mode 100644
index 0000000..8cfd418
--- /dev/null
+++ b/select where.sql	
@@ -0,0 +1,8 @@
+USE Study
+GO
+
+SELECT ENAME, DNO FROM EMPLOYEE WHERE ENO = 110
+
+SELECT ENAME, JOB
+FROM EMPLOYEE
+WHERE DNO = 20 AND SALARY >= 400
\ No newline at end of file