Cursor

Think of a cursor in SQL like a pointer that allows you to navigate through a set of rows returned by a query, one row at a time. It’s like a virtual hand that can grab one row of data from a table, process it, and then move on to the next row. Types of Cursors: There are mainly two types of cursors in SQL: Implicit Cursors: These cursors are created by default when you execute a SQL query. They are easy to use but have limited functionality. Explicit Cursors: These cursors are explicitly defined by the programmer using the DECLARE CURSOR statement. They offer more control and flexibility but require more coding. Sample Data: Let’s say we have a simple table called students with columns student_id, name, and age. Here’s some sample data: ...

Think of a cursor in SQL like a pointer that allows you to navigate through a set of rows returned by a query, one row at a time. It’s like a virtual hand that can grab one row of data from a table, process it, and then move on to the next row. Types of Cursors: There are mainly two types of cursors in SQL: Implicit Cursors: These cursors are created by default when you execute a SQL query. They are easy to use but have limited functionality. Explicit Cursors: These cursors are explicitly defined by the programmer using the DECLARE CURSOR statement. They offer more control and flexibility but require more coding. Sample Data: Let’s say we have a simple table called students with columns student_id, name, and age. Here’s some sample data: ...