Introduction to SQL

Q1: A subquery in an SQL SELECT statement is enclosed in:

A braces -- {...}.

B CAPITAL LETTERS.

C parenthesis -- (...) .

D brackets -- [...].

Q2: To define what columns should be displayed in an SQL SELECT statement:

A use FROM to name the source table(s) and list the columns to be shown after SELECT.

B use USING to name the source table(s) and list the columns to be shown after SELECT.

C use SELECT to name the source table(s) and list the columns to be shown after USING.

D use USING to name the source table(s) and list the columns to be shown after WHERE.

Q3: The result of a SQL SELECT statement is a(n) ________ .

A report

B form

C file

D table

Q4: To remove duplicate rows from the results of an SQL SELECT statement, the ________ qualifier specified must be included.

A ONLY

B UNIQUE

C DISTINCT

D SINGLE

Q5: The HAVING clause does which of the following?

A Acts like a WHERE clause but is used for groups rather than rows.

B Acts like a WHERE clause but is used for rows rather than columns.

C Acts like a WHERE clause but is used for columns rather than groups.

D Acts EXACTLY like a WHERE clause.

Q6: Which of the following do you need to consider when you make a table in SQL?

A Data types

B Primary keys

C Default values

D All of the above.

Q7: The SQL WHERE clause:

A limits the column data that are returned.

B limits the row data are returned.

C Both A and B are correct.

D Neither A nor B are correct.

Q8: Which of the following are the five built-in functions provided by SQL?

A COUNT, SUM, AVG, MAX, MIN

B SUM, AVG, MIN, MAX, MULT

C SUM, AVG, MULT, DIV, MIN

D SUM, AVG, MIN, MAX, NAME

Q9: The SQL keyword BETWEEN is used:

A for ranges.

B to limit the columns displayed.

C as a wildcard.

D None of the above is correct.

Q10: The Microsoft Access wildcards are ____ and ____ .

A asterisk (*); percent sign (%)

B percent sign (%); underscore (_)

C underscore(_); question mark (?)

D question mark (?); asterisk (*)

Q11: The benefits of a standard relational language include which of the following?

A Reduced training costs

B Increased dependence on a single vendor

C Applications are not needed.

D All of the above.

Q12: ON UPDATE CASCADE ensures which of the following?

A Normalization

B Data Integrity

C Materialized Views

D All of the above.

Q13: SQL data definition commands make up a(n) ________ .

A DDL

B DML

C HTML

D XML

Q14: When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):

A LIKE only.

B IN only.

C NOT IN only.

D Both IN and NOT IN.

Q15: SQL query and modification commands make up a(n) ________ .

A DDL

B DML

C HTML

D XML

Q16: The command to eliminate a table from a database is:

A REMOVE TABLE CUSTOMER;

B DROP TABLE CUSTOMER;

C DELETE TABLE CUSTOMER;

D UPDATE TABLE CUSTOMER;

Q17: Which of the following is valid SQL for an Index?

A CREATE INDEX ID;

B CHANGE INDEX ID;

C ADD INDEX ID;

D REMOVE INDEX ID;

Q18: The SQL keyword(s) ________ is used with wildcards.

A LIKE only

B IN only

C NOT IN only

D IN and NOT IN

Q19: The command to remove rows from a table 'CUSTOMER' is:

A REMOVE FROM CUSTOMER ...

B DROP FROM CUSTOMER ...

C DELETE FROM CUSTOMER WHERE ...

D UPDATE FROM CUSTOMER ...

Q20: To sort the results of a query use:

A SORT BY.

B GROUP BY.

C ORDER BY.

D None of the above is correct.

Q21: You can add a row using SQL in a database with which of the following?

A ADD

B CREATE

C INSERT

D MAKE

Q22: The wildcard in a WHERE clause is useful when?

A An exact match is necessary in a SELECT statement.

B An exact match is not possible in a SELECT statement.

C An exact match is necessary in a CREATE statement.

D An exact match is not possible in a CREATE statement.

Q23: The SQL -92 wildcards are ____ and ____ .

A asterisk (*); percent sign (%)

B percent sign (%); underscore (_)

C underscore(_); question mark (?)

D question mark (?); asterisk (*)

Q24: Which one of the following sorts rows in SQL?

A SORT BY

B ALIGN BY

C ORDER BY

D GROUP BY

Q25: SQL can be used to:

A create database structures only.

B query database data only.

C modify database data only.

D All of the above can be done by SQL.

Q26: A subquery in an SQL SELECT statement:

A can only be used with two tables.

B can always be duplicated by a join.

C has a distinct form that cannot be duplicated by a join.

D cannot have its results sorted using ORDER BY.

Q27: Find the SQL statement below that is equal to the following: SELECT NAME FROM CUSTOMER WHERE STATE = 'VA';

A SELECT NAME IN CUSTOMER WHERE STATE IN ('VA');

B SELECT NAME IN CUSTOMER WHERE STATE = 'VA';

C SELECT NAME IN CUSTOMER WHERE STATE = 'V';

D SELECT NAME FROM CUSTOMER WHERE STATE IN ('VA');

Q28: In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:

A all columns of the table are to be returned.

B all records meeting the full criteria are to be returned.

C all records with even partial criteria met are to be returned.

D None of the above is correct.

Q29: A view is which of the following?

A A virtual table that can be accessed via SQL commands

B A virtual table that cannot be accessed via SQL commands

C A base table that can be accessed via SQL commands

D A base table that cannot be accessed via SQL commands

Q30: Which of the following is the correct order of keywords for SQL SELECT statements?

A SELECT, FROM, WHERE

B FROM, WHERE, SELECT

C WHERE, FROM,SELECT

D SELECT,WHERE,FROM

Q31: ________ was adopted as a national standard by ANSI in 1992.

A Oracle

B SQL

C Microsoft Access

D DBase

Q32: The SQL statement that queries or reads data from a table is ________ .

A SELECT

B READ

C QUERY

D None of the above is correct.

Q33: Which of the following is the original purpose of SQL?

A To specify the syntax and semantics of SQL data definition language

B To specify the syntax and semantics of SQL manipulation language

C To define the data structures

D All of the above.

Q34: SQL is:

A a programming language.

B an operating system.

C a data sublanguage.

D a DBMS.


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