Select Query (/database/sql-tutorial/6-select-query)Page 3 of 3

Q18:Select records using group by;18.1

SELECT deptno,sum(sal)FROM emp GROUP BY deptno

18.2

SELECT deptno,sum(sal) FROM emp GROUP BY deptno,ename ,empno

Q19:Select records using group by and having clause;

SELECT deptno,sum(sal) GROUP BY deptno HAVING deptno>20

Q20:select with-in select;20.1

SELECT * FROM emp WHERE max(sal)

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SELECT sysdate FROM dual;

Q24:Select constraint name, constraint_type;

SELECT constraint_name, constraint_typeFROM user_constraintsWHERE table_name = 'emp';

Q25:Select nextval, currval from sequence;25.1

SELECT emp_sequence.nextval FROM dual

25.2

SELECT emp_sequence.currval FROM dual

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