In SQL, which command is used to remove a table's data but keep the structure?OptionsDELETEDROPREMOVETRUNCATE
Question
In SQL, which command is used to remove a table's data but keep the structure?
Options:
DELETE
DROP
REMOVE
TRUNCATE
Solution
Break Down the Problem
- Identify the task: Determine which SQL command removes data from a table while preserving its structure.
- List the options provided: DELETE, DROP, REMOVE, TRUNCATE.
Relevant Concepts
- DELETE: This command is used to remove rows from a table based on a condition. It retains the table's structure.
- DROP: This command completely removes a table and its structure from the database.
- REMOVE: This is not a standard SQL command.
- TRUNCATE: This command removes all rows from a table but keeps its structure intact, making it a more efficient operation than DELETE when removing all data.
Analysis and Detail
- DELETE can be used to remove specific records, hence it retains the structure but may not be efficient for removing all records.
- DROP eliminates both the table and its structure, which is not applicable here as we need to keep the structure.
- REMOVE does not exist in SQL and is incorrect.
- TRUNCATE is indeed designed to remove all records from a table while the structure remains. This command is generally faster than DELETE since it does not log individual row deletions.
Verify and Summarize
From the analysis, the command that aligns with the requirement to remove data while keeping the structure is TRUNCATE.
Final Answer
The correct SQL command to remove a table's data but keep its structure is TRUNCATE.
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