01. ORACLE BASIC QUERY (NULL, ALIAS, CONCATENATION, WHERE, PLAN, INDEX_VIEW, ORDER BY)
1. Temp 테이블 생성 CREATE TABLE TEMP ( EMP_ID NUMBER NOT NULL PRIMARY KEY, EMP_NAME VARCHAR2(10) NOT NULL, BIRTH_DATE DATE, DEPT_CODE VARCHAR2(06) NOT NULL, EMP_TYPE VARCHAR2(04), USE_YN VARCHAR2(01) NOT NULL, TEL VARCHAR2(15), HOBBY VARCHAR2(30), SALARY NUMBER, LEV VARCHAR2(04) ); 2. TDEPT 테이블 생성 CREATE TABLE TDEPT ( DEPT_CODE VARCHAR2(06) NOT NULL PRIMARY KEY, DEPT_NAME VARCHAR2(20) NOT NULL, PARE..
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