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
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
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
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
Close cursor_name; Parameter:
Cursor_name: name of the cursor
Example for the cursor:
Step 1: Open the database and table.
Step 2: Now create the cursor.
Query:
Step 3: Now call the cursor.
Query:
SET @name_list ="";
CALL list_name(@name_list);
SELECT @name_list;
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