How do I use cursor to fetch multiple records?

How do I use cursor to fetch multiple records?

Procedure

1. Specify the cursor using a DECLARE CURSOR statement.
2. Perform the query and build the result table using the OPEN statement.
3. Retrieve rows one at a time using the FETCH statement.
4. Process rows with the DELETE or UPDATE statements (if required).
5. Terminate the cursor using the CLOSE statement.

How do I use multiple cursors in SQL Server?

Multiple Cursors

1. Drag for multiple cursors. Hold Shift+Option , then click and drag your cursor.
2. Click for multiple cursors in selected places. Hold Option , then click wherever you want your cursor to appear.
3. Move a line without copy and pasting. Hold Option , then either the up or down arrow keys.

How do I fetch multiple columns in SQL?

To select multiple columns from a table, simply separate the column names with commas! For example, this query selects two columns, name and birthdate , from the people table: SELECT name, birthdate FROM people; Sometimes, you may want to select all columns from a table.

What cursor type do you use to retrieve multiple recordsets?

Answer: We can use explicit cursors to retrieve multiple rows from a table in PL/SQL. For example – DECLARE CURSOR emp_cur IS SELECT * FROM EMP WHERE salary > 5000; In the above example we are creating a cursor ’emp_cur’ on a query which returns the records of all the employees with salary greater than 5000.

How do I stop cursors?

In this article, we’ll look at some alternatives to using SQL cursors which can help avoid performance issues caused by using cursors….The process of using a SQL cursor can be generally described as follows:

1. Declare Cursor.
2. Open Cursor.
3. Fetch rows.
4. Close Cursor.
5. Deallocate Cursor.

What is the use of cursor in SQL Server?

Cursors In SQL Server. A SQL cursor is a database object that retrieves data from result sets one row at a time.The cursor in SQL can be used when the data needs to be updated row by row.

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 cursor in SQL?

Cursors in SQL. A cursor is a temporary work area created in system memory when a SQL statement is executed. A cursor is a set of rows together with a pointer that identifies a current row. It is a database object to retrieve data from a result set one row at a time.

What is Oracle cursor?

Oracle Cursor. A cursor is a pointer to a private SQL area that stores information about the processing of a SELECT or DML statements like INSERT, UPDATE, DELETE or MERGE.