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93 Cards in this Set
- Front
- Back
1) SQL stands for Standard Query Language. |
Answer: FALSE
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2) SQL includes a data definition language, a data manipulation language, and SQL/Persistent stored modules.
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Answer: TRUE
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3) SQL is only a data manipulation language (DML).
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Answer: FALSE
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4) The American National Standards Institute (ANSI) maintains the standards for SQL.
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Answer: TRUE
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5) SQL was developed by IBM in the late 1970s.
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Answer: TRUE
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6) SQL is not a complete programming language. Rather it is a data sublanguage.
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Answer: TRUE
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7) In addition to being a data sublanguage, SQL is also a programming language, like Java or C#.
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Answer: FALSE
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8) SQL commands can be embedded in application programs.
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Answer: TRUE
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9) SQL, although very popular, has never become a national standard.
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Answer: FALSE
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10) The SQL keyword SELECT is used to specify the columns to be listed in the query results.
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Answer: TRUE
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11) The SQL keyword WHERE is used to specify the table(s) that contain(s) the data to be retrieved.
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Answer: FALSE
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12) The SQL keyword FROM is used to specify the table to be used.
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Answer: TRUE
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13) SQL can only query a single table.
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Answer: FALSE
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14) SQL statements end with a colon.
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Answer: FALSE
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15) The columns to be obtained by an SQL command are listed after the FROM keyword.
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Answer: FALSE
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16) To remove duplicate rows from the result of a query, specify the SQL DISTINCT keyword.
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Answer: TRUE
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17) To obtain all columns, use an asterisk (*) wildcard character instead of listing all the column names.
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Answer: TRUE
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18) The SQL WHERE clause contains the condition that specifies which rows are to be selected.
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Answer: TRUE
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19) The result of an SQL SELECT operation can contain duplicate rows.
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Answer: TRUE
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20) To have SQL automatically eliminate duplicate rows from a result, use the keyword DISTINCT with the FROM keyword.
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Answer: FALSE
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21) An asterisk (*) following the SELECT verb means that all columns are to be displayed.
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Answer: TRUE
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22) The WHERE clause contains the condition that specifies which columns are to be selected.
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Answer: FALSE
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23) The rows of the result table can be sorted by the values in one or more columns.
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Answer: TRUE
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24) Sorting is specified by the use of the SORT BY phrase.
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Answer: FALSE
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25) To sort the rows of the result table, the ORDER BY clause is specified.
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Answer: FALSE
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26) Columns can be sorted in descending sequence by using the SQL DESC keyword.
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Answer: TRUE
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27) A WHERE clause can contain only one condition.
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Answer: FALSE
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28) When two conditions must both be true for the rows to be selected, the conditions are separated by the SQL AND keyword.
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Answer: TRUE
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29) To refer to a set of values needed for a condition, use the SQL IN operator.
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Answer: TRUE
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30) To exclude one or more values using a condition, the SQL OUT keyword must be used.
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Answer: FALSE
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31) To refer to a set of values in a condition, the values are placed inside parentheses ( ) and separated by commas.
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Answer: TRUE
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32) The condition in WHERE clauses can refer to a set of values by using the IN operator.
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Answer: TRUE
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33) The SQL keyword LIKE is used in SQL expressions to select on partial values.
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Answer: TRUE
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34) The SQL wildcard character "%" represents a series of one or more unspecified characters.
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Answer: TRUE
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35) The SQL wildcard character "#" indicates a single, unspecified character in a specific location in an SQL query.
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Answer: FALSE
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36) The Microsoft Access wildcard character "*" (asterisk) indicates a sequence of one or more unspecified characters in a Microsoft Access SQL query.
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Answer: TRUE
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37) The Microsoft Access wildcard character "_" (underscore) indicates a single, unspecified character in a specific location in a Microsoft Access SQL query.
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Answer: FALSE
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38) The SQL built-in function ADDUP totals values in numeric columns.
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Answer: FALSE
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39) The SQL built-in function AVG computes the average of values in numeric columns.
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Answer: TRUE
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40) The SQL built-in function MOST obtains the largest value in a numeric column.
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Answer: TRUE
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41) The SQL built-in function MIN obtains the smallest value in a numeric column.
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Answer: TRUE
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42) The SQL built-in function COUNT computes the number of rows in a query.
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Answer: TRUE
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43) The built-in function SUM can be used with any column.
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Answer: FALSE
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44) The clause SELECT COUNT (*) results in a table with a single row and a single column.
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Answer: TRUE
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45) Arithmetic in SQL statements is limited to the operations provided by the built-in functions.
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Answer: FALSE
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46) The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column.
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Answer: TRUE
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47) A WHERE clause can contain another SELECT statement enclosed in parentheses.
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Answer: TRUE
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48) A SELECT statement used in a WHERE clause is called a subquery.
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Answer: TRUE
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49) A nested SELECT statement (one that appears within the WHERE clause of another SQL statement) is called a subquery and must be enclosed in parentheses.
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Answer: TRUE
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50) Only two tables can be queried by using a subquery.
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Answer: FALSE
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51) An alternative to combining tables by a subquery is to use a join.
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Answer: TRUE
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52) When people use the term "join" they normally mean an "equijoin."
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Answer: TRUE
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53) Two or more tables are joined by giving the table names in the WHERE clause and specifying the equality of the respective column names as a condition in the GROUP BY clause.
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Answer: FALSE
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54) The names of tables to be joined in an SQL query are listed in the FROM clause.
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Answer: TRUE
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55) In an SQL query, a join operation is achieved by specifying the equality of the respective column names as a condition in the WHERE clause.
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Answer: TRUE
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56) Every subquery can be alternatively expressed by a join.
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Answer: FALSE
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57) While many subqueries can be alternatively written as joins, correlated subqueries do work that cannot be duplicated as a join.
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Answer: TRUE
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58) The SQL syntax JOIN . . . ON can be used as alternate way of writing an SQL join statement.
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Answer: TRUE
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59) Joins that show only matching rows from the joined tables in their results are called inner joins.
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Answer: TRUE
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60) Joins that show the matching rows from the joined tables plus unmatched rows from one other table in their results are called outer joins.
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Answer: TRUE
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61) Outer joins can be either up joins or down joins.
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Answer: FALSE
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62) SQL is a ________.
A) data sublanguage B) product of IBM research C) national standard D) combination that includes a data definition language and a data manipulation language E) All of the above |
Answer: E
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63) When making an SQL query, we are using SQL as a(n) ________.
A) DDL B) DML C) embedded language D) SET E) WHERE |
Answer: B
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64) In an SQL query, which SQL keyword actually creates the query?
A) EXISTS B) FROM C) SELECT D) SET E) WHERE |
Answer: C
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65) In an SQL query, which SQL keyword is used to specify the table(s) to be used?
A) EXISTS B) FROM C) SELECT D) SET E) WHERE |
Answer: B
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66) In an SQL query, which SQL keyword must be used to remove duplicate rows from the result table?
A) DELETE B) DISTINCT C) NOT EXISTS D) UNIQUE E) KEY |
Answer: B
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67) In an SQL query, which of the following symbols is used by ANSI SQL to represent all the columns in a single table?
A) _ (underscore) B) ? (question mark) C) * (asterisk) D) % (percent) E) # (pound) |
Answer: C
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68) In an SQL query, which SQL keyword is used to state the condition that specifies which rows are to be selected?
A) EXISTS B) FROM C) SELECT D) SET E) WHERE |
Answer: E
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69) In an SQL query, which SQL keyword is used to join two conditions that both must be true for the rows to be selected?
A) AND B) EXISTS C) HAVING D) IN E) OR |
Answer: A
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70) In an SQL query, which SQL keyword is used to determine if a column value is equal to any one of a set of values?
A) AND B) EXISTS C) HAVING D) IN E) OR |
Answer: D
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71) In an SQL query, which of the following symbols is used by ANSI SQL to represent a single unspecified character?
A) _ (underscore) B) ? (question mark) C) * (asterisk) D) % (percent) E) # (pound) |
Answer: A
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72) In an SQL query, which of the following symbols is used by Microsoft Access to represent a single unspecified character?
A) _ (underscore) B) ? (question mark) C) * (asterisk) D) % (percent) E) # (pound) |
Answer: B
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73) In an SQL query, which SQL keyword is used to sort the result table by the values in one or more columns?
A) GROUP BY B) ORDER BY C) SELECT D) SORT BY E) WHERE |
Answer: B
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74) Given a table with the structure: EMPLOYEE (EmpNo, Name, Salary, HireDate), which of the following would find all employees whose name begins with the letter "S" using standard SQL?
A) SELECT * FROM EMPLOYEE WHERE Name IN ['S']; B) SELECT EmpNo FROM EMPLOYEE WHERE Name LIKE 'S'; C) SELECT * FROM Name WHERE EMPLOYEE LIKE 'S*'; D) SELECT * FROM EMPLOYEE WHERE Name LIKE 'S%'; E) None of the above. |
Answer: D
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75) Given a table with the structure: EMPLOYEE (EmpNo, Name, Salary, HireDate), which of the following would find all employees whose name begins with the letter "S" using Microsoft Access?
A) SELECT * FROM EMPLOYEE WHERE Name IN ['S']; B) SELECT EmpNo FROM EMPLOYEE WHERE Name LIKE 'S'; C) SELECT * FROM Name WHERE EMPLOYEE LIKE 'S*'; D) SELECT * FROM EMPLOYEE WHERE Name LIKE 'S%'; E) None of the above. |
Answer: C
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76) In an SQL query, which built-in function is used to total numeric columns?
A) AVG B) COUNT C) MAX D) MEAN E) SUM |
Answer: E
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77) In an SQL query, which built-in function is used to compute the average value of numeric columns?
A) AVG B) MEAN C) MAX D) MIN E) SUM |
Answer: A
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78) In an SQL query, which built-in function is used to obtain the largest value of numeric columns?
A) AVG B) COUNT C) MAX D) MIN E) SUM |
Answer: C
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79) In an SQL query, which built-in function is used to obtain the smallest value of numeric columns?
A) AVG B) COUNT C) MAX D) MIN E) SUM |
Answer: D
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80) In an SQL query, the built-in functions SUM and AVG work with columns containing data of which of the following data types?
A) Integer B) Numeric C) Char D) A and B E) A, B, and C |
Answer: D
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81) In an SQL query, which built-in function is used to compute the number of rows in a table?
A) AVG B) COUNT C) MAX D) MIN E) MEAN |
Answer: B
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82) In an SQL query, the built-in function COUNT works with columns containing data of which of the following data types?
A) Integer B) Numeric C) Char D) A and B E) A, B, and C |
Answer: E
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83) In an SQL query, which SQL keyword is used with built-in functions to group together rows that have the same value in a specified column?
A) GROUP BY B) ORDER BY C) SELECT D) SORT BY E) DISTINCT SET |
Answer: A
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84) In an SQL query, which SQL keyword is used with GROUP BY to select groups meeting specified criteria?
A) AND B) EXISTS C) HAVING D) IN E) WHERE |
Answer: C
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85) Given a table with the structure: EMPLOYEE (EmpNo, Name, Salary, HireDate), which of the following is not a valid ANSI SQL command?
A) SELECT * FROM EMPLOYEE WHERE Name LIKE 'Ja%'; B) SELECT COUNT(*) FROM EMPLOYEE WHERE Salary < 30000; C) SELECT COUNT(EmpNo) FROM EMPLOYEE; D) SELECT HireDate, COUNT(*) FROM EMPLOYEE WHERE Salary < 30000; E) SELECT HireDate, COUNT(*) FROM EMPLOYEE GROUP BY HireDate; |
Answer: D
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88) In an SQL query, which SQL keyword is used to implement a subquery?
A) GROUP BY B) HAVING C) ORDER BY D) SELECT E) SORT BY |
Answer: D
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89) When one SQL query is embedded in another SQL query, this is referred to as a ________.
A) subset B) join C) WHERE Query D) subquery E) set query |
Answer: D
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90) When one SQL query is embedded in another SQL query, the second SQL query is embedded in the ________ of the first query.
A) SELECT B) FROM C) WHERE D) GROUP BY E) HAVING |
Answer: C
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91) When one SQL query is embedded in another SQL query, the first SQL query can still contain an SQL ________ clause.
A) FROM THE B) WHERE THE C) ORDER BY D) GROUP BY E) C and D |
Answer: E
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92) In an SQL query, which SQL keyword is used to specify the names of tables to be joined?
A) FROM B) HAVING C) JOIN D) SELECT E) WHERE |
Answer: A
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93) In an SQL query, which SQL keyword is used to specify the column names to be used in a join?
A) FROM B) HAVING C) JOIN D) SELECT E) WHERE |
Answer: E
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94) Regarding the interchangeability of subqueries and joins,
A) a join can always be used as an alternative to a subquery, and a subquery can always be used as an alternative to a join. B) a join can sometimes be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join. C) a join can always be used as an alternative to a subquery, and a subquery can sometimes be used as an alternative to a join. D) a join can sometimes be used as an alternative to a subquery, and a subquery can always be used as an alternative to a join. E) a join can never be used as an alternative to a subquery, and a subquery can never be used as an alternative to a join. |
Answer: B
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95) In an SQL query of two tables, which SQL keyword indicates that we want data from all the rows of one table to be included in the result, even if the row does not correspond to any data in the other table? |
Answer: D |