What are the important topics in MySQL?

Or jump directly to a topic in MySQL:

• MySQL Functions. Functions – Alphabetical.
• MySQL Keys, Constraints and Indexes. Primary Keys.
• MySQL Privileges and Passwords. Grant/Revoke Privileges.
• MySQL Database Administration. Users.
• MySQL Programming. Functions.
• MySQL Comparison Operators.
• MySQL Query Types.
• MySQL Joins.

How do you talk in MySQL?

Connecting to MySQL Using the MySQL Command-Line Client

1. Locate the MySQL Command-Line Client.
2. Run the client.
3. Enter your password.
4. Get a list of databases.
5. Create a database.
6. Select the database you want to use.
7. Create a table and insert data.
8. Finish working with the MySQL Command-Line Client.

What is blob in MySQL?

A BLOB is a binary large object that can hold a variable amount of data. BLOB values are treated as binary strings (byte strings). They have the binary character set and collation, and comparison and sorting are based on the numeric values of the bytes in column values.

How can get second highest salary in MySQL?

Second Highest Salary in MySQL without LIMIT SELECT MAX(salary) FROM Employee WHERE Salary NOT IN ( SELECT Max(Salary) FROM Employee); This will return 200 in our case. SELECT MAX(Salary) From Employee WHERE Salary < ( SELECT Max(Salary) FROM Employee);

What are the tables in MySQL?

The mysql Database Tables

• mysql. column_stats Table.
• mysql.columns_priv Table. Column-level privileges.
• mysql. db Table.
• mysql.event Table. Information about MariaDB events.
• mysql.func Table. User-defined function information.
• mysql.general_log Table. Contents of the general query log if written to table.
• mysql.
• mysql.

What are MySQL questions?

Common MySQL Interview Questions & Answers

• What is MySQL?
• Why is MySQL so popular?
• What are the tables in MySQL?
• Write a query for a column addition in MySQL.
• What is a foreign key?
• What is MySQL workbench?
• How does database import/export work in MySQL?
• How can we delete a column or a row in MySQL?

What should I know in SQL?

11 Must-Know SQL Statements for Data Scientists

• Creating a database. A relational database consists of tables that relate to each other based on columns.
• Create a table.
• Deleting a table.
• Adding a new column.
• Deleting a column.
• Describe.
• Insert into.
• Delete from.