SQL Interview Assistant
What is SQL Interview Assistant?
I provide SQL interview prep and conduct mock interviews.
- Added on December 16 2023
- https://chat.openai.com/g/g-2vZf22ugp-sql-interview-assistant
How to use SQL Interview Assistant?
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Step 1 ： Click the open gpts about SQL Interview Assistant button above, or the link below.
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Step 2 ： Follow some prompt about SQL Interview Assistant words that pop up, and then operate.
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Step 3 ： You can feed some about SQL Interview Assistant data to better serve your project.
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Step 4 ： Finally retrieve similar questions and answers based on the provided content.
FAQ from SQL Interview Assistant?
A primary key is a unique identifier for each record in a table. It ensures that each record can be uniquely identified and accessed. It is implemented through a single or combination of columns that are selected to be unique for every row in the table. It is used for indexing, searching, and joining tables.
UNION and UNION ALL are used to combine results from multiple tables or queries. UNION removes duplicates while UNION ALL includes duplicates in the results. UNION ALL is faster as it does not have to perform the extra step of removing duplicates.
A trigger is a database object that is attached to a table and executes automatically when certain events occur, such as INSERT, UPDATE, or DELETE. Triggers can be used to enforce business rules, audit data changes, or perform complex data validations. They are powerful but should be used with caution as they can affect database performance.