SQL Interview Questions and Answers 2025 2025 | Top SQL Interview Questions and Answers For Freshers
| Quiz Name | SQL Interview Questions and Answers set 2 |
| Category | Reasoning |
| Number of Questions | 30 |
| Time | 30 Minutes |
| Exam Type | MCQ (Multiple Choice Questions) |
1. Which SQL command set is used to manage Oracle Database structures, such as tables?
a. Data Manipulation Language (DML) is a programming language that allows you to manipulate data (DML)
b. Data Definition Language (DDL) (DDL)
c. Both of the preceding options
d. None at all.
2. ——- and are the SQL -92 wildcards.
a. the asterisk (*); the percentage sign ( percent )
b. % symbol (%); underscore ( )
c. question mark (?) and underscore ( ).
d. a question mark (?) and an asterisk (*).
3. To delete a table from a database, use the following command:
a. DROP TABLE CUSTOMER;
b. REMOVE THE CUSTOMER TABLE;
c. REMOVE THE CUSTOMER TABLE;
d. UPDATE CUSTOMER TABLE;
4. Which of the following was the original aim of SQL?
a. To define the data structures
b. To define the syntax and semantics of the SQL data defining language
c. To define the syntax and semantics of the SQL manipulation language
d. All of the aforementioned.
5. A composite attribute is transformed to individual attributes using the normal form.
a. First
b. 2nd
c. Third
d. 4th
6. The SQL term BETWEEN is used:
a. as a wildcard
b. to limit the number of columns displayed.
c. is for ranges.
d. None of the above are correct.
7. Assume that the relations corresponding to the preceding schema are not empty. Which of the following is the right interpretation of the given question?
a. Identify all providers who have not supplied exclusively non-blue parts.
b. Locate the names of all providers who have delivered a non-blue part.
c. Identify all suppliers who have supplied just non-blue parts.
d. Identify all providers who have not supplied a non-blue part.
8. Which clause is used to join rows from two or more tables based on a shared column?
a. MATCH IN SQL SERVER
b. SQL JOIN is a type of join that connects two tables in a database
c. PATTERN SQL
d. NONE
9. Which SQL query allows us to update the definition of a table?
a. MODIFY
b. UPDATE
c. CREATE
d. SELECT
10. If a query contains NOT, AND, OR with no parenthesis!
a. NOT will be evaluated first; AND will be evaluated second; OR will be evaluated last.
b. NOT will be evaluated first; OR will be evaluated second; AND will be evaluated last.
c. AND will be reviewed first, OR will be evaluated second, and NOT will be evaluated last.
d. The order of occurrence dictates the order of judgement.
11. What is used to give a temporary name to a table or a column in a table to improve readability?
a. SQL Wildcards
b. SQL aliases
c. SQL LIKES
d. SQL Remarks
12. When three or more AND and OR conditions are combined, the SQL keyword(s):
a. Only LIKE.
b. IN alone.
c. Only NOT IN.
d. Both IN and NOT IN.
13. Which function is used to divide one numeric expression by another and find the remainder?
a. PERFORMANCE
b. MODEL
c. ROUND
d. REMAINDER
14. Which of the following group methods does not take into account NULL values?
a. MAX
b. COUNT
c. SUMMARY
d. All of the aforementioned
15. The ALTER TABLE statement is used to modify an existing table.
a. Include columns
b. Include restrictions
c. Columns should be removed.
d. All of the above
16. The qualifier must be provided to delete duplicate entries from the results of a SQL SELECT operation.
a. ONLY
b. UNIQUE
c. DISTINCTIVE
d. SINGLE
17. The qualifier must be provided to delete duplicate entries from the results of a SQL SELECT operation.
a. ONLY
b. UNIQUE
c. DISTINCTIVE
d. SINGLE
18. Which of the following SQL commands is used to delete a table?
a. Remove
b. truncate
c. remove
d. drop
19. The statement that is automatically executed by the system as a result of database modification is
a. backup
b. claim
c. recovery
d. trigger
20. Which of the following operations necessitates union compatibility of the relations?
a. THE UNION
b. INTERSECTION
c. DIFFERENCE
d. EVERYONE OF THESE
21. The asterisk (*) in a SQL SELECT statement querying a single table, according to the SQL-92 standard, signifies that:
a. All columns of the table must be returned.
b. All records that match the full set of requirements must be returned.
c. All records that meet even a partial set of criteria must be returned.
d. None of the above are correct.
22. Which of the following statements concerning the SQL PRIMARY KEY requirement is incorrect?
a. The PRIMARY KEY uniquely identifies each record in a SQL database table.
b. Multiple columns can be used to create a primary key.
c. The primary key must consist of a single column.
d. Primary keys must have UNIQUE values.
23. Which SQL term is used to obtain only unique values?
a. UNIQUE
b. UNIQUEE
c. DISTINCTIVE
d. DIFFERENT
24. If you don’t specify ASC or DESC after a SQL ORDER BY clause, the following is utilised by default.
a. ASC
b. DESC
c. There is no default setting.
d. none of the preceding
25. SQL clause is used to combine the results of two or more SELECT statements.
a. SQL UNION
b. SQL JOIN
c. SQL GROUP BY
d. NONE
26. Which of the following is a SQL comparison operator?
a. double equal sign (==)
b. LIKE
c. BETWEEN
d. A single equal sign (=)
27. What is SQL in its entire form?
a. Structured Query Language (SQL) is an abbreviation for Structured Query
b. Query List Structured
c. Simple Query Language (SQL) is a programming language that is used to create
d. None of these are correct.
28. TCL commands are which of the following?
a. TRUNCATE and UPDATE
b. SELECT and INSTALL
c. REVOKE and GRANT
d. ROLLBACK and SAVEPOINT are both commands in D. ROLLBACK and SAVEPOINT are both commands in D
29. The incorrect remark concerning the UPDATE keyword is
a. If the WHERE clause in the statement is absent, all records will be updated.
b. Using the WHERE clause, only one entry can be modified at a time.
c. Using the WHERE clause, many records can be updated at the same time.
d. There is no incorrect statement.
30. Which of the following statements about the usage of modifiers is true?
a. If no accessibility modifier (public, protected, or private) is supplied for a member declaration, the member is only accessible to classes in the package of its class and subclasses of its class anywhere.
b. You cannot specify the accessibility of local variables. They are only accessible within the block in which they are declared.
c. Subclasses of a class must be in the same package as the class they extend.
d. Local variables can be declared static.