Structured Query a Language (SQL)
Haryana Board · Class 12 · Computer Science
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What does SQL stand for?
Which SQL statement is used to create a new database?
Which data type is used to store text with variable length in MySQL?
Which constraint ensures that a column cannot have NULL values?
Sample Questions
Which SQL statements are part of Data Manipulation Language (DML)?
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INSERT, SELECT, UPDATE, DELETE
DML includes INSERT (add data), SELECT (retrieve data), UPDATE (modify data), and DELETE (remove data). CREATE is part of DDL (Data Definition Language).
What is the correct syntax to insert data into a table?
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INSERT INTO tablename VALUES(value1, value2)
The INSERT INTO statement is used to add new records to a table. The VALUES clause specifies the actual data to be inserted.
Which SQL clause is used to filter records based on conditions?
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WHERE
The WHERE clause is used to specify conditions for filtering records. It determines which rows should be retrieved, updated, or deleted.
Which keyword is used to eliminate duplicate rows in query results?
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DISTINCT
DISTINCT is used with SELECT to return only unique values and eliminate duplicate rows from the result set.
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