MySQL Cursor

In MySQL, Cursor can also be created. Following are the steps for creating a cursor.

1. Declare Cursor

A cursor is a select statement, defined in the declaration section in MySQL.

Syntax

snippet
DECLARE cursor_name CURSOR FOR
Select statement;

Parameter:

cursor_name: name of the cursor

select_statement: select query associated with the cursor

2. Open Cursor

After declaring the cursor the next step is to open the cursor using open statement.

Syntax

snippet
Open cursor_name;

Parameter:

cursor_name: name of the cursor which is already declared.

3. Fetch Cursor

After declaring and opening the cursor, the next step is to fetch the cursor. It is used to fetch the row or the column.

Syntax

snippet
FETCH [ NEXT [ FROM ] ] cursor_name INTO variable_list;

Parameter:

cursor_name: name of the cursor

variable_list: variables, comma separated, etc. is stored in a cursor for the result set

4. Close Cursor

The final step is to close the cursor.

Syntax

snippet
Close cursor_name;

Parameter:

Cursor_name: name of the cursor

Example for the cursor:

Step 1: Open the database and table.

MySQL Cursor

Step 2: Now create the cursor.

Query:

MySQL Cursor

Step 3: Now call the cursor.

Query:

snippet
SET @name_list ="";
CALL list_name(@name_list);
SELECT @name_list;
MySQL Cursor
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