Question

QUESTION 21

1. Complete the table below by matching each definition with the appropriate SQL clause.

-A.B.C.D.E.F.G.H.I.J.K.L.M.N. A mandatory clause that is at the start of all SQL retrieval queries -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause used to return only the values in a result table that are unique -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause used to filter tuples according to some condition or predicate, like selection in relational algebra -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause that is used to list the tables and any joins required in a query -A.B.C.D.E.F.G.H.I.J.K.L.M.N. An operator that allows multiple values to be specified in a comparison statement -A.B.C.D.E.F.G.H.I.J.K.L.M.N. An operator used to assign an alias to a table or attribute -A.B.C.D.E.F.G.H.I.J.K.L.M.N. If used it must be the last clause in a query -A.B.C.D.E.F.G.H.I.J.K.L.M.N. Allows tuples which have the same value for one or more attributes to be grouped together and treated as a unit when using aggregate functions -A.B.C.D.E.F.G.H.I.J.K.L.M.N. A clause which can be used to filter groups that appear in the final result table -A.B.C.D.E.F.G.H.I.J.K.L.M.N. An operator used to create a table with all rows from two tables

A. AS B. GROUP BY C. IN D. WHERE E. SELECT F. NATURAL JOIN G. INNER JOIN H. LIKE I. ORDER BY J. HAVING K. SELECT DISTINCT L. ON M. FROM N. UNION

Answer 1

A mandatory clause that is at the start of all SQL retrieval queries : SELCT
A clause used to return only the values in a result table that are unique : SELECT DISTINCT
A clause used to filter tuples according to some condition or predicate, like selection in relational algebra: WHERE
A clause that is used to list the tables and any joins required in a query : ON
An operator that allows multiple values to be specified in a comparison statement : IN
An operator used to assign an alias to a table or attribute : AS
If used it must be the last clause in a query: HAVING

Allows tuples which have the same value for one or more attributes to be grouped together and treated as a unit when using aggregate functions : GROUP BY

A clause which can be used to filter groups that appear in the final result table

An operator used to create a table with all rows from two tables : UNION