7. A type of query that is placed wifkin a ourer join. a) master query, b) subquery, 8. SQI provides the IIAVING claC a) grouping 9. b) joining takes a value of true if b) HA SING c) subquery ) einm. morerows.10.EXISTSwilltakeavalueofb)HAVI contains one or more rows. a) FAISE b) 1 c) TRCIE (1) unism 11. The clause is used to combine the output from muitiple queties intes a singeremitan a) INTERSECT b) DIVIDE e) COLLAIE a) 1DMroys 12. In order for two queries to be UNION-compatible, they must a) both have the same number of lines in their sor siatements. b) both output same number of columns with cornpatible cata typess. c) both return at least one row. d) all of the above. 13. The UNION clause is used to: a) combine the output from multiple queries into a single resuit tabie. b) join two tables together to form one table, c) find all rows that do not match in two tables. d) none of the above. 14. All of the following are guidelines for better query design except a) understand how indexes are used in query processing, b) use a lot of self-joins. c) write simple queries. d) retrieve on the data that you need. 15. What results would the following SQL statement produce (where dha tahies is the onwre containing the metadata for other tables)? select owner, table name from dba tables a) A listing of all customers in the customer table b) A listing of the owner of the customer table d) An error message