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SQL Basics Quiz
Quiz on SQL basics
Question 1
Which SQL component is responsible for evaluating multiple execution plans to determine the most efficient way to process a query?
Query Parser
Execution Engine
Query Optimizer
Storage Engine
Question 2
What is the primary purpose of Data Control Language (DCL) commands in SQL?
To define database schemas (e.g., CREATE TABLE)
To manage user permissions (e.g., GRANT, REVOKE)
To manipulate data (e.g., INSERT, UPDATE)
To handle transactions (e.g., COMMIT, ROLLBACK)
Question 3
Which organization first standardized SQL as a query language?
IEEE
ANSI and ISO
W3C
ECMA
Question 4
What is the maximum allowed character length for table names in SQL according to the standard rules mentioned?
30 characters
20 characters
15 characters
No fixed limit
Question 5
Which of the following is NOT listed as an advantage of SQL in the article?
Built-in backup and recovery tools
Support for real-time analytics
Multiple data views capability
Standardized language across platforms
Question 6
What is identified as a key reason for SQL's partial control limitation?
Complex syntax requirements
Hidden business rules
High licensing costs
Platform dependency issues
Question 7
Which of the following correctly represents a valid SQL bit string literal?
'10101010'
B'1010'
X'G5'
"11001100"
Question 8
How would you write an approximate numeric literal representing 5.5 × 10³ in SQL?
5.5^3
5.5E3
5.5*10³
5500.00
Question 9
Which SQL data type would be most appropriate for storing international customer names that may include non-Latin characters?
VARCHAR
CHAR
NVARCHAR
TEXT
Question 10
For a financial application requiring exact decimal precision in currency calculations, which numeric data type should be preferred?
FLOAT
REAL
DECIMAL
BIGINT
There are 10 questions to complete.