Question 1

Which part of a SQL query specifies the table names that contain the data you want to display in the query results?

Accepted Answer

The FROM clause in a SQL query specifies the table names from which to retrieve the data.

Question 2

In an Access query, a "group" of records _____.

Accepted Answer

Groups of records in an Access query are defined by having the same value in a particular field, which is often used in aggregate functions or when sorting and filtering data based on specific criteria.

Question 3

Which of the following operators allows you to specify a range and is often used with date criteria?

Accepted Answer

The BETWEEN operator allows you to specify a range, making it particularly useful for setting criteria for dates, as well as numbers and text in SQL queries.

Question 4

Which SQL commands do you use to update the values of an existing field?

Accepted Answer

The UPDATE command is used to modify existing records in a table, and the SET clause specifies the columns and values that should be updated.

Question 5

In Access SQL, you use the asterisk (*) as a wildcard character to represent any number of characters.

Accepted Answer

The asterisk (*) is a wildcard character in Access SQL that can represent any number of characters. This means that you can use it to find records that contain a specific string of characters, even if you don't know the exact characters. For example, the following query would find all records that contain the string "John":```SELECT * FROM Customers WHERE Name LIKE "John*"```

Question 6

SQL uses an on-screen form to create tables, update tables, and retrieve data from tables.

Accepted Answer

SQL (Structured Query Language) is a programming language used for managing and manipulating relational databases through queries, not an on-screen form. Users write SQL commands to create tables, update data, and retrieve data.

Question 7

When you connect query conditions using the AND operator, only one of the conditions must be true for a particular record to be selected.

Accepted Answer

When you connect query conditions using the AND operator, all of the conditions must be true for a particular record to be selected.

Question 8

While not always required, how should you end an SQL command?

Accepted Answer

SQL commands are typically ended with a semicolon (;) to mark the end of a statement, allowing for multiple statements to be executed in a single script or command line.

Question 9

Fields appear in alphabetical order based on fieldname in the query results of a SELECT clause.

Accepted Answer

The order of fields in the query results of a SELECT clause is determined by the order in which they are listed in the SELECT statement, not alphabetically.

Question 10

Which of the following is currently considered the most sought-after language for programmers?

Accepted Answer

SQL is highly sought after due to its widespread use in database management and data analysis, which are critical skills in many tech-related jobs.

Question 11

In a query that uses an aggregate function, which SQL clause do you use to include criteria that limits the number of records selected for the query?

Accepted Answer

The HAVING clause is used in SQL to specify conditions that filter which group results appear in the final results, especially when using aggregate functions. It is similar to WHERE but is used after grouping the data.

Question 12

In Access SQL, which operator do you use in the WHERE clause when you want to include a wildcard in the criterion?

Accepted Answer

The LIKE operator is used in the WHERE clause to search for a specified pattern in a column.

Question 13

In what type of SQL operation must two tables have the same field structure?

Accepted Answer

In a UNION operation, the two tables involved must have the same number of columns and corresponding data types in order to be combined into a single result set. This operation stacks rows from both tables on top of each other, requiring identical field structures for compatibility.

Question 14

What would you most likely use in SQL to perform calculations on groups of records?

Accepted Answer

Aggregate functions are used in SQL to perform calculations on a set of values and return a single value. Examples include SUM, AVG, MAX, MIN, and COUNT, which are used to summarize data from a database, making them ideal for working with groups of records.

Question 15

When do you use the & operator in an expression in Access Query Design View?

Accepted Answer

The & operator is used in Access Query Design View to concatenate, or combine, values in character (text) fields.

Question 16

When you use a name containing a space in Access SQL, what must you do to specify the table or column name?

Accepted Answer

In Access SQL, when using a name that contains a space for a table or column, it must be enclosed in [square brackets] to be correctly recognized.

Question 17

What SQL command can you use to join two tables?

Accepted Answer

The answer of What SQL command can you use to...

Question 18

When a SQL statement consists of two queries and you place one query inside another, the inner query becomes a(n) _____.

Accepted Answer

The inner query placed inside another query in SQL is referred to as a subquery. Subqueries are used to perform operations that must be completed before the main query can proceed.

Question 19

Which of the following SQL statements selects ProductDescription and Price fields for every record in the Products table with a Price value greater than $50.00?

Accepted Answer

Option A is correct because it uses the correct SQL syntax to select the specified fields from the Products table where the condition (Price > 50) is met.

Question 20

A good name for an Access table might be tbl!Student.

Accepted Answer

A good name for an Access table typically avoids special characters like "!" and instead might use a prefix such as "tbl" followed by the name, such as "tblStudent", without special characters for clarity and to avoid potential errors.

Quiz 7: Database Management Systems Processes and Services