Sub-queries can be nested in?UPDATE, DELETE, INSERT and SELECT statements.INSERT statements only.DELETE statements only.UPDATE statements only.

Break Down the Problem

1. Identify the types of SQL statements where sub-queries can be utilized.
2. Analyze the usage and applicability of sub-queries in each SQL statement type provided in the options.

Relevant Concepts

Sub-queries in SQL are queries nested within another SQL query. They can be used in various types of SQL commands to filter or manipulate datasets based on the results of another query.

Analysis and Detail

1. INSERT Statements: Can include sub-queries to set values based on values computed from other tables.
2. DELETE Statements: Can use sub-queries to specify which records to delete based on a condition that can involve another table.
3. UPDATE Statements: Similar to DELETE, sub-queries can refine which records to update based on data from another table.
4. SELECT Statements: Often utilize sub-queries to retrieve data conditionally based on the results of another select.

Verify and Summarize

Sub-queries can be nested in all of the given SQL statement types: UPDATE, DELETE, INSERT, and SELECT. This versatility is a fundamental aspect of SQL that allows for complex data manipulation and retrieval.

Final Answer

Sub-queries can be nested in UPDATE, DELETE, INSERT, and SELECT statements.