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ISE 224 > Chapter 2 > Flashcards

Chapter 2 Flashcards

0
Q

SQL includes a data definition language, a data manipulation language, and SQL/Persistent stored modules

A

True

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1
Q

SQL stands for Standard Query Language

A

False

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2
Q

SQL is only a data manipulation language (DML)

A

False

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3
Q

The American National Standards Institute (ANSI) maintains the standards for SQL

A

True

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4
Q

SQL was developed by IBM in the late 70s

A

True

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5
Q

SQL is not a complete programming language. Rather it is a data sub language.

A

True

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6
Q

In addition to being a data sub language, SQL is also a programming language, like java or C#

A

False

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7
Q

SQL commands can be embedded in application programs

A

True

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8
Q

SQL although very popular has never become a national standard

A

False

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9
Q

The SQL keyword SELECT is used to specify the columns to be listed in the query results

A

True

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10
Q

The SQL keyword WHERE is used to specify the tables that contain(s) the data to be retrieved

A

False

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11
Q

The SQL keyword FROM is used to specify the table to be used

A

True

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12
Q

SQL can only query a single table

A

False

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13
Q

SQL statements end with a colon

A

False

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14
Q

The columns to be obtained by an SQL command are listed after the FROM keyword

A

False

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15
Q

To remove duplicate rows from the result of a query, specify the SQL DISTINCT keyword

A

True

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16
Q

To obtain all columns, use an asterisk (*) wild card character instead of listing all the column names

A

True

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17
Q

The SQL WHERE clause contains the condition that specifies which rows are to be selected

A

True

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18
Q

The result of an SQL SELECT operation can contain duplicate rows

A

True

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19
Q

To have SQL automatically eliminate duplicate rows from a result, use the keyword DISTINCT with the FROM keyword

A

False

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20
Q

An asterisk (*) following the SELECT verb means that all columns are to be displayed

A

True

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21
Q

The WHERE clause contains the condition that specifies which columns are to be selected

A

False

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22
Q

SQL is a

A

Data sub language, product of IBM, national standard, combination that includes a data definition language and a data manipulation language

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23
Q

When making an SQL query, we are using SQL as a(n)

A

DML

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24
In an SQL query, which SQL keyword actually creates the query
SELECT
25
In an SQL query, which SQL keyword is used to specify the table(s) to be used?
FROM
26
In an SQL query, which SQL keyword must be used to remove duplicate rows from the result table?
DISTINCT
27
In an SQL query, which of the follows symbols is used by ANSI SQL to represent all the columns in a single table?
* (asterisk)
28
The rows of the result table can be sorted by the values in one or more columns
true
29
sorting is specified by the use of the SORT BY phrase
False
30
To sort the rows of the result table, the ORDER BY clause is specified
False
31
Columns can be sorted in descending sequence by using the SQL DESC keyword
True
32
A WHERE clause can contain only one condition
False
33
When two conditions must both be true for the rows to be selected, the conditions are separated by the SQL AND keyword
True
34
To exclude one or more values using a condition, the SQL OUT keyword must be used
False
35
To refer to a set of values in a condition, the values are placed inside parentheses ( ) and separated by columns
True
36
The condition in WHERE clauses can refer to a set of values by using the IN operator
True
37
The SQL keyword LIKE is used in SQL expression to select on partial values
True
38
The SQL wildcard character "%" represents a series of one or more unspecified characters
True
39
The SQL wildcard character "#" indicates a single, unspecified character in a specific location in a SQL query
False
40
The Microsoft Access wildcard character "*" indicated a sequence of one or more unspecified characters in a Microsoft Access SQL query
True
41
The Microsoft Access wildcard character "_" indicated a single, unspecified character in a specific location in a Microsoft Access SQL query
False
42
In an SQL query, which SQL keyword is used to join two conditions that both must be true for the rows to be selected?
AND
43
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
IN
44
In an SQL query, which of the following symbols is used by ANSI SQL to represents a single unspecified character?
_ (underscore)
45
In an SQL query, which of the following symbols is used by Microsoft Access to represent a single unspecified character?
? (question mark)
46
In an SQL query, which SQL keyword is used to sort the result table by the values in one or more columns?
ORDER BY
47
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?
SELECT* FROM EMPLOYEE WHERE Name LIKE 'S%';
48
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?
SELECT * FROM Name WHERE EMPLOYEE LIKE 'S*';
49
The SQL keyword GROUP BY instructs the DBMS to group together those rows that have the same value in a column.
True
50
A WHERE clause can contain another SELECT statement enclosed in parentheses.
True
51
A SELECT statement used in a WHERE clause is called a subquery.
True
52
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.
True
53
Only two tables can be queried by using a subquery.
False
54
An alternative to combining tables by a subquery is to use a join.
True
55
When people use the term "join" they normally mean an "equijoin."
True
56
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 caluse.
False
57
The names of the tables to be joined in an SQL query are listed in the FROM clause.
True
58
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.
True
59
Every subquery can be alternatively expressed by a join.
False
60
While many subqueries can be alternatively written as joins, correlated subqueries do work that cannot be duplicated as a join.
True
61
The SQL syntax JOIN...ON can be used as alternate way of writing an SQL join statement.
True
62
Joins that show only matching rows from the joined tables in their results are called inner joins.
True
63
Joins that show the matching rows from the joined tables plus unmatched rows from one other table in their results are called out joints.
True
64
Outer joins can be either up joins or down joins.
False
65
In an SQL query, which built-in function is used to total numeric columns?
SUM
66
In an SQL query, which built-in function is used to compute the average value of numeric columns?
AVG
67
In an SQL query, which built-in function is used to obtain the largest value of numeric columns?
MAX
68
In an SQL query, which built-in function is used to obtain the smallest value of numeric columns?
MIN
69
In an SQL query, the built-in functions SUM and AVG work with columns containing data of which of the following data types?
Integer and Numeric
70
In an SQL query, which built-in function is used to compute the number of rows in a table?
COUNT
71
In an SQL query, the built-in function COUNT works with columns containing data of which of the following data types?
Integer, Numeric, Char
72
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?
GROUP BY
73
In an SQL query, which SQL keyword is used with GROUP BY to select groups meeting specified criteria?
HAVING
74
In an SQL query, which SQL keyword is used to implement a subquery?
SELECT
75
When one SQL query is embedded in another SQL query, this is referred to as a _____ .
subquery
76
When one SQL query is embedded in another SQL query, the second SQL query is embedded in the ____ of the first query.
WHERE
77
When one SQL query is embedded in another SQL query, the first SQ query can still contain an SQL _____ clause.
ORDER BY and GROUP BY
78
In an SQL query, which SQL keyword is used to specify the names of tables to be joined?
FROM
79
In an SQL query, which SQL keyword is used to specify the column names to be used in a join?
WHERE
80
Regarding the interchangeability of subqueries and joins,
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 (B)
81
In an SQL query of two tables, which SQL keyword indicated 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?
LEFT JOIN and RIGHT JOIN

ISE 224 (8 decks)

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