Inserting records into a database

The INSERT statement in SQL is used to add new records (or rows) to a table in a database. This allows you to specify values for one or more columns in the table.


Basic Syntax for INSERT

1. Inserting Data into All Columns

If you're inserting data into every column of the table, you don’t need to list the column names (as long as you provide values for every column).

2. Inserting Data into Specific Columns

If you're inserting data into only certain columns, you must specify the column names. The other columns will either take their default value or be set to NULL.

3. Inserting Multiple Rows at Once

You can insert several rows of data at the same time by separating each row's values with commas.

4. Inserting Data from Another Table

You can insert data into a table based on a query that selects data from another table.

Common Use Cases for INSERT:

Adding new records such as employees, customers, or products.


Copying data from one table to another.


Inserting test data or sample records into a table.


Things to Keep in Mind:

If a column has an auto-increment setting (like an ID column), you don’t need to insert a value for that column; it will be automatically generated.


Ensure that the values you're inserting match the data types of the corresponding columns.

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