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DataBase Fundamentals new

DataBase Fundamentals new

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What is the correct syntax to insert a query result into another table and sort the result by a specific column in descending order?

INSERT INTO new_table (column1, column2)

SELECT column1, column2

FROM original_table;

INSERT INTO new_table (column1, column2, column3)

SELECT column1, column2, column3

FROM original_table

ORDER BY column3 DESC;

INSERT INTO new_table

FROM original_table

ORDER BY column3 DESC

INSERT INTO new_table

FROM original_table

ORDER BY column3 DESC;

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Which of the following is the correct syntax for inserting the result of a query into another table in PostgreSQL?

INSERT INTO table_2 (column_1, column_2, column_3)

INSERT SELECT column_1, column_2, column_3

WHERE condition;

INSERT INTO table_2 (column_1, column_2, column_3)

SELECT column_1, column_2, column_3

WHERE condition;

INSERT INTO table_2 (column_1, column_2, column_3)

SET column_1, column_2, column_3 =

SELECT column_1, column_2, column_3

WHERE condition;

INSERT INTO table_2 (column_1, column_2, column_3)

SELECT FROM table_1

WHERE condition;

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What is the correct syntax to insert a NULL value in a PostgreSQL table?

INSERT INTO table_name (column1) VALUES (NOT NULL);

INSERT INTO table_name (column1) VALUES ('NOT NULL');

INSERT INTO table_name (column1) VALUES ('NULL');

INSERT INTO table_name (column1) VALUES (NULL);

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What is the correct syntax to insert a new row into a table named users with columns id, name, email?

INSERT INTO (id, name, email)

VALUES (1, 'John Doe', '[email protected]');

INSERT INTO users

SET id=1, name='John Doe', email='[email protected]';

INSERT INTO users (id, name, email)

VALUES (1, 'John Doe', '[email protected]');

INSERT INTO table users (id, name, email)

VALUES (1, 'John Doe', '[email protected]');

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Which data type would you use to store whole numbers in SQL?

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What is the purpose of the UNIQUE constraint in SQL?

To define a primary key for a table

To enforce a unique value for a column

To specify the data type of a column

To set a default value for a column when NULL is provided

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What is the purpose of an index in a database?

To store computed values based on other columns.

To store large binary objects such as images or documents.

To improve the performance of data retrieval operations.

To optimize the database querying speed

To enforce referential integrity between tables.

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What is the purpose of the DROP TABLE statement in SQL?

To delete a table from a database

To delete a database

To delete a column from a table

To delete a record from a table

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What is the purpose of the DEFAULT keyword in SQL?

To specify the data type of a column

To create a default index for a table

To set a default value for a column when no value is specified

To define the maximum value allowed for a column

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What is the purpose of the CHECK constraint in SQL?

To define a primary key for a table

To enforce referential integrity between tables

To specify the data type of a column

To enforce a condition on the values in a column

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