Mastering SQL: INSERT Statements: Adding Data to Your Tables [SESSION# 4]

    SQL INSERT Statements: Adding Data to Your Tables

In SQL, the INSERT statement is often used to insert values into a table.

Depending on the database management system (DBMS) you're using, such as MySQL, PostgreSQL, SQL Server, or SQLite, the precise syntax for the INSERT command may differ slightly. The fundamental structure is comparable, though. Here is a typical illustration:

Here's a breakdown of the statement:

• INSERT INTO table_name: This part of the statement specifies the name of the table to which you want to add data.

• (column1, column2, column3, ...): These are the names of the columns in the table where you want to insert data. If you want to insert data into all columns, you can omit this part and go directly to the VALUES clause.

• VALUES (value1, value2, value3, ...): This part of the statement contains the values you want to insert into the specified columns. The values must be in the same order as the columns you specified.

Here's an example of how to use the INSERT statement:

Suppose you have a table named employees with the following columns: employee_id, first_name, last_name, and salary. You want to add a new employee with the following information:

• employee_id: 101
• first_name: John
• last_name: Smith
• salary: 50000

Here's the SQL statement to insert this data into the employees table:

After executing this SQL statement, the data will be added to the employees table.

Please make sure to adapt the table name, column names, and values to your specific database schema and requirements. Additionally, be aware of any constraints or data types defined in your table that may affect the insertion of data.

Next session will cover "FROM AND WHERE CLAUSE"

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