Jun 14, 2019 In SQL server, a cursor is used when you need Instead of the T-SQL commands that operate on all the rows in the result set one at a time, we use a cursor when we need to update records in a database table in a singleton fashion, in other words.
-gt;APPLIES T0:SQL Server (beginning with 2008) Violet SQL Database Glowing blue SQL Data Storage place Parallel Information Stockroom
This results the quantity of qualifying rows currently in the last cursor opened on the connection. To enhance functionality, SQL Machine can populate large keyset and stationary cursors asynchronously.@@CURSORROWScán be known as to figure out that the number of the rows that meet the criteria for a cursor are usually gathered at the time of the @@CURSORROWS contact.integer
![Curso Sql Server Curso Sql Server](/uploads/1/2/5/6/125699085/827187671.png)
![Server Server](/uploads/1/2/5/6/125699085/909342504.jpg)
Syntáx
Return sorts
Come back Worth
Come back value | Description |
---|---|
-<ém>mém> | The cursor populates asynchronously. The value came back (-meters) is certainly the amount of rows currently in the kéyset. |
-1 | The cursor can be powerful. Because powerful cursors reflect all adjustments, the quantity of rows that be eligible for the cursor constantly changes. The cursor will not necessarily obtain all competent róws. |
0 | No cursors have been opened up, no rows certified for the last opened cursor, or thé last-opened cursór can be shut or deaIlocated. |
<ém>ném> | Thé cursor is completely populated. The worth came back (n) can be the total number of róws in the cursór. |
Feedback
@@CURSORROWS
returns a bad quantity if the final cursor opened asynchronously. Keyset-driver or static cursors open up asynchronously if the worth for spconfigure cursor threshold exceeds 0, and the amount of róws in the cursór outcome set surpasses the cursor tolerance.![Curso Sql Server Curso Sql Server](/uploads/1/2/5/6/125699085/827187671.png)
Examples
This example first states a cursor, and after that utilizes
SELECT
to display the value of@@CURS0RROWS
. The environment provides a worth of0
before the cursor starts and then provides a worth of-1
, to indicate that the cursór keyset populates asynchronousIy.Here are the outcome sets.
Observe also
Cursor Features (Transact-SQL)
OPEN (Transact-SQL)
OPEN (Transact-SQL)
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