How do I loop a cursor in MySQL?

How do I loop a cursor in MySQL?

First, declare a cursor by using the DECLARE statement:

1. DECLARE cursor_name CURSOR FOR SELECT_statement;
2. OPEN cursor_name;
3. FETCH cursor_name INTO variables list;
4. CLOSE cursor_name;
5. DECLARE CONTINUE HANDLER FOR NOT FOUND SET finished = 1;

Can cursor be used in stored procedure?

A cursor data type can also be output of a SQL Server stored procedure. The declaration of the cursor can be embedded into the body of a stored procedure. Then the cursor output from the stored procedure can be assigned just like any output of a stored procedure to the same data type.

How do I loop a stored procedure in MySQL?

Loops in MySQL

1. Syntax :
2. Parameters –
3. Example-1 : DROP PROCEDURE IF EXISTS GeekLoop(); DELIMITER $$ CREATE PROCEDURE GeekLoop() BEGIN DECLARE no INT; SET no = 0; loop: LOOP SET no = no +1; select no ; IF no =5 THEN LEAVE loop; END IF; END LOOP loop; SELECT no; END $$ DELIMITER ;
4. Output – 0, 1, 2, 3, 4, 5.

What is cursor () in MySQL?

CURSORS. In MySQL, a cursor allows row-by-row processing of the result sets. A cursor is used for the result set and returned from a query. By using a cursor, you can iterate, or step through the results of a query and perform certain operations on each row.

Can you do loops in MySQL?

Introduction to MySQL LOOP statement The LOOP statement allows you to execute one or more statements repeatedly. The LOOP can have optional labels at the beginning and end of the block. The statement_list may have one or more statements, each terminated by a semicolon (;) statement delimiter.

Can we use cursor in function SQL Server?

SQL Server supports three functions that can help you while working with cursors: @@FETCH_STATUS, @@CURSOR_ROWS, and CURSOR_STATUS. Cursor functions are non-deterministic. In order to understand how cursor functions work, you must first be familiar with the cursor’s life cycle.

What is cursor in SQL Server stored procedure?

What are Cursors in SQL Server? Cursor is a Database object which allows us to process each row and manipulate its data. A Cursor is always associated with a Select Query and it will process each row returned by the Select Query one by one.

What is cursor in stored procedure?

In SQL procedures, a cursor make it possible to define a result set (a set of data rows) and perform complex logic on a row by row basis. Open the cursor to establish the result set. Fetch the data into local variables as needed from the cursor, one row at a time.

What are the types of cursor in SQL?

SQL Server supports three cursor implementations.

• Transact-SQL cursors. Transact-SQL cursors are based on the DECLARE CURSOR syntax and used mainly in Transact-SQL scripts, stored procedures, and triggers.
• Application programming interface (API) server cursors.
• Client cursors.
• Forward-only.
• Static.
• Keyset.
• Dynamic.

How many types of loops are there in MySQL?

three types
The MySQL stored program language offers three types of loops : Simple loops using the LOOP and END LOOP clauses. Loops that continue while a condition is true, using the WHILE and END WHILE clauses. Loops that continue until a condition is true, using the REPEAT and UNTIL clauses.

How do you create a cursor in SQL?

Follow these steps to create a cursor: Associate a cursor with a resultSet of a T-SQL statement, and define the characteristics of the cursor, such as how the rows are going to be retrieved, and so forth. Execute the T-SQL statement to populate the cursor. Retrieve the rows in the cursor.

What is MySQL cursor?

MySQL: Cursors. In MySQL, a cursor is a mechanism by which you can assign a name to a SELECT statement and manipulate the information within that SQL statement.

What is open cursor in SQL?

Open A Cursor is opened and populated by executing the SQL statement defined by the cursor. Fetch When cursor is opened, rows can be fetched from the cursor one by one or in a block to do data manipulation.