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SQL stands for Structured Query Language
It is used for managing and manipulating data stored in relational databases.SQL is used to interact and analyze large amounts of data. It is a key tool for Data Analysts and Scientists.
SQL can be used for:
Creating, modifying, and deleting databases and tables.
Inserting, updating, and deleting data in databases.
Retrieving data from databases.
Setting permissions on database objects.
Creating and executing stored procedures.
Some Basic SQL commands
Some important SQL commands are SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, and ALTER. These commands allow you to retrieve, modify, and structure data in your database.
SQL is used in a wide range of industries and is a valuable skill to have in any career related to data management or analysis.
Top 10 SQL Interview Questions
1. What is the difference between SQL and MySQL?
2. What are the different subsets of SQL?
3. What do you mean by DBMS? What are its different types?
4. What do you mean by table and field in SQL?
5. What are joins in SQL?
6. What is the difference between CHAR and VARCHAR2 datatype in SQL?
7. What is the Primary key?
8. What are Constraints?
9. What is the difference between DELETE and TRUNCATE statements?
10. What is a Unique key?
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