PLPAfrica/AshrafAhmed-Project

SQL Assignment

AshrafAhmed-Project

SQL Assignment

1. The SELECT statement in SQL retrieves data from a database table. It allows you to specify which columns you want to retrieve, as well as any conditions or expressions to filter or manipulate the data.

Here's a simple example of a SELECT statement retrieving all columns from a table:

• SQL SELECT * FROM tableName; This statement retrieves all columns (*) from the table named tableName.

2. The SELECT, FROM, and WHERE clauses in SQL queries work together as follows: - SELECT: Specify the columns you want to retrieve from the table. - FROM: Specifies the table from which you want to retrieve the data. - WHERE: Filters the rows retrieved from the table based on specified conditions.
3. Here's a simple example demonstrating their combined use: SQL SELECT column1, column2 FROM tableName WHERE condition;
   • This statement selects column1 and column2 from the table named tableName, but only for rows that meet the specified condition.