T-SQL And General SQL: Unit 1 - Introduction To SQL Queries

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| By Ifeanyiisitor

Ifeanyiisitor

Community Contributor

Quizzes Created: 1 | Total Attempts: 243

Questions: 26 | Attempts: 243 | Updated: Mar 20, 2023

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Questions and Answers

1.

T-SQL: What is the format for the 'date' datatype?

Explanation
SEE: http://msdn.microsoft.com/en-us/library/bb630352.aspx

Not that date values must be passed in as string (e.g., '1981-06-09')

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2.

SQL: Write an sql statement to insert 1227 and 'Manager' into the 'empno' and 'job' column of the dbo.emp table respectively.

Explanation
SEE: http://msdn.microsoft.com/en-us/library/ms174335.aspx

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4 1
3.

T-SQL: What keyboard shortcut do you use in sql server management studio to execute an sql statement?

Explanation
Pressing the F5 key in SQL Server Management Studio allows the user to execute an SQL statement. This shortcut is commonly used to quickly run queries and commands without the need to manually click on the execute button.

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4.

T-SQL: You have a table with a colum entitled 'job', whose values are all lower case. If you execute the following query: SELECT ename, job, deptno FROM dbo.emp WHERE job = 'CLERK' you will not get any results back buecase the match is case sensitve and so because all values of the 'job' colum are lowercase, uppercase 'CLERK' will not be found.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
With SQL Server, the match is not case sensitve

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5.

SQL: what operator is used to perform a search that matches a range of values?

Correct Answer
BETWEEN
between
Between

Explanation
The operator used to perform a search that matches a range of values in SQL is "BETWEEN". It is case-insensitive, so it can be written as "between" or "Between" as well. This operator is commonly used in SQL queries to specify a range of values for a particular condition, such as selecting records with values between a certain minimum and maximum value.

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6.

SQL: What operator(s) can be used to perform a search that is not in a specified range of values?

Correct Answer
NOT BETWEEN
Not Between
not between
Not between
not Between

Explanation
The correct answer is "NOT BETWEEN". This operator is used in SQL to perform a search that is not within a specified range of values. It allows you to exclude values that fall between two given values. The case sensitivity of the operator does not matter, so it can be written as "Not Between", "not between", "Not between", or "not Between" as well.

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7.

SQL: What operator is used for negation?

Correct Answer
NOT
not
Not
!

Explanation
The operator used for negation in SQL is "NOT". It can be written in lowercase as "not" or in title case as "Not". Another symbol that can be used for negation is the exclamation mark "!".

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8.

SQL: What operator is used to compare against null values?

Correct Answer
IS NULL
is null
Is Null

Explanation
The operator "IS NULL" is used to compare against null values in SQL. It can be written in lowercase or uppercase letters, as "is null" or "Is Null". This operator is used to check if a value is null or not, as null values cannot be compared using the regular comparison operators such as "=", ">", "

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9.

SQL: What operator(s) is used to compare against values that are not null?

Correct Answer
IS NOT NULL
is not null
Is Not Null

Explanation
The operator "IS NOT NULL" is used in SQL to compare against values that are not null. This operator is case-insensitive, so it can be written as "is not null" or "Is Not Null" as well. It is used in conditional statements to filter out rows where a particular column does not have a null value.

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10.

SQL: What operator would you use to compare against values that are not null?
- A.
  
  NOT NULL
- B.
  
  NOT IS NULL
- C.
  
  IS NOT NULL
- D.
  
  !NULL
Correct Answer
C. IS NOT NULL

Explanation
The IS NOT NULL operator is used in SQL to compare values that are not null. It returns true if the value is not null and false if the value is null. This operator is commonly used in WHERE clauses to filter out null values from the result set.

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11.

SQL: What operator would you use to compare against values that are not like other values?
- A.
  
  NOT LIKE
- B.
  
  IS NOT LIKE
- C.
  
  NOT IS LIKE
Correct Answer
A. NOT LIKE

Explanation
The NOT LIKE operator is used in SQL to compare values that are not similar to other values. It allows for the comparison of strings based on patterns, where the specified pattern does not match the values being compared. This operator is useful when you want to retrieve records that do not have a specific pattern or do not match a certain string.

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12.

SQL: What operator would you use to find values that are not in a specified list?
- A.
  
  NOT IN LIST
- B.
  
  NOT IN
- C.
  
  IS NOT IN
Correct Answer
B. NOT IN

Explanation
The NOT IN operator is used to find values that are not present in a specified list. It is commonly used in SQL queries to filter out records that do not match the values provided in the list. By using the NOT IN operator, you can easily exclude specific values from the result set based on your criteria.

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13.

SQL: What does the wildcard expression % stand for?

Correct Answer
zero or more characters

Explanation
The wildcard expression % in SQL stands for zero or more characters. This means that when using the % wildcard in a SQL query, it can match any sequence of characters of any length. It is commonly used in conjunction with the LIKE operator to perform pattern matching in SQL queries.

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14.

SQL: What does the wildcard underscore operator (_) stand for?

Correct Answer
any one character

Explanation
The wildcard underscore operator (_) in SQL is used to represent any single character. It can be used in a query to match a single character in a specific position within a string. For example, if we have a column with values like "cat", "bat", and "hat", we can use the underscore operator to search for all three-letter words that end with "at" by using the pattern '_at'. This will return all the matching rows with values "cat", "bat", and "hat".

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15.

SQL: What operator do you use to perform wildcard matches?

Correct Answer
LIKE

Explanation
An example is as follows:

SELECT ename, job, deptno
FROM dbo.emp
WHERE ename LIKE 'M%'

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16.

SQL: What is the 'not equals' operator?

Correct Answer
<>

Explanation
The 'not equals' operator in SQL is represented by the symbol ''. It is used to compare two values and returns true if the values are not equal, and false if they are equal. It is commonly used in SQL queries to filter out specific values that do not match a certain condition.

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17.

T-SQL: A column name can be specified without using the 'AS' keyword as folows: SELECT sal*1.10 new_sal FROM dbo.emp
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
Either

SELECT sal*1.10 new_sal
FROM dbo.emp

or

SELECT sal * 1.10 AS new_sal
FROM dbo.emp

is valid.

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18.

SQL: What are the purposes of the * symbol in a SELECT statement?
19.

T-SQL: Write the SQL to list all employees (empno, sal) whose salary (sal) is between 1000 and 2000. The table in question is called 'emp'.
20.

T-SQL: Write the SQL to display each of the different types of occupation (i.e. each occupation only once). The table in question is called 'emp', and the occupation column is called 'job'
21.

T-SQL: Write the SQL to display all the employees who were recruited during 1983 giving their name (ename), department number(deptno) and hire date(hiredate). The table in question is 'emp', with the default owner.
22.

T-SQL: Write the SQL to find the names (ename), jobs (job) and salaries (sal) of all employees who do not have managers (mgr). The table in question is called 'emp', with the default owner.
23.

T-SQL: Write the SQL to list the jobs (job) and department numbers (deptno) of employees whose names (ename) ends with s. The table in question is called 'emp' with the default owner.
24.

T-SQL: Find employees (ename, job) who are not managers or the president. The table in question is 'emp', with the default owner
25.

T-SQL: Write the SQL to work out what percentage of salary (sal) the commission (comm) is for an employee who earns commission. The table in quesiton is called 'emp', with the default owner.
26.

T-SQL: Write the SQL to list the department number (deptno), name (ename), job (job) and salary (sal) of all employees, firstly in department number (deptno) order and then in salary (sal) order, showing the highest salary for each department first. The table in question is called 'emp', with a default owner.

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Current Version
Mar 20, 2023

Quiz Edited by
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Apr 05, 2011

Quiz Created by
Ifeanyiisitor

T-SQL And General SQL: Unit 1 - Introduction To SQL Queries

T-SQL: What is the format for the 'date' datatype?

SQL: Write an sql statement to insert 1227 and 'Manager' into the 'empno' and 'job' column of the dbo.emp table respectively.

T-SQL: What keyboard shortcut do you use in sql server management studio to execute an sql statement?

SQL: what operator is used to perform a search that matches a range of values?

SQL: What operator(s) can be used to perform a search that is not in a specified range of values?

SQL: What operator is used for negation?

SQL: What operator is used to compare against null values?

SQL: What operator(s) is used to compare against values that are not null?

SQL: What operator would you use to compare against values that are not null?

SQL: What operator would you use to compare against values that are not like other values?

SQL: What operator would you use to find values that are not in a specified list?

SQL: What does the wildcard expression % stand for?

SQL: What does the wildcard underscore operator (_) stand for?

SQL: What operator do you use to perform wildcard matches?

SQL: What is the 'not equals' operator?

T-SQL: A column name can be specified without using the 'AS' keyword as folows: SELECT sal*1.10 new_sal FROM dbo.emp

SQL: What are the purposes of the * symbol in a SELECT statement?

T-SQL: Write the SQL to list all employees (empno, sal) whose salary (sal) is between 1000 and 2000. The table in question is called 'emp'.

T-SQL: Write the SQL to display each of the different types of occupation (i.e. each occupation only once). The table in question is called 'emp', and the occupation column is called 'job'

T-SQL: Write the SQL to display all the employees who were recruited during 1983 giving their name (ename), department number(deptno) and hire date(hiredate). The table in question is 'emp', with the default owner.

T-SQL: Write the SQL to find the names (ename), jobs (job) and salaries (sal) of all employees who do not have managers (mgr). The table in question is called 'emp', with the default owner.

T-SQL: Write the SQL to list the jobs (job) and department numbers (deptno) of employees whose names (ename) ends with s. The table in question is called 'emp' with the default owner.

T-SQL: Find employees (ename, job) who are not managers or the president. The table in question is 'emp', with the default owner

T-SQL: Write the SQL to work out what percentage of salary (sal) the commission (comm) is for an employee who earns commission. The table in quesiton is called 'emp', with the default owner.