In this article, we will explore how to use SQL Server scroll cursors to selectively pick a row from the cursor instead of looping through rows one by one. Solution ASQL Server cursoris T-SQL logic to loop through a finite number of rows which are determined by the query that is used ...
changes made to rows in the database after the row was fetched aren't visible through the cursor. Forward-only cursors are dynamic by default, meaning that all changes are detected as the current row is processed. This provides faster cursor opening and enables the result set to ...
SQL Server provides the@@FETCHSTATUSfunction that returns the status of the last cursorFETCHstatement executed against the cursor;If@@FETCHSTATUSreturns 0, meaning theFETCHstatement was successful. You can use theWHILEstatement to fetch all rows from the cursor as shown in the following code: WHIL...
T-SQL and SQL Server are designed to work best with sets of data, not one row at a time. Jeff Moden famously termed this type of processing RBAR (pronounced, ree-bar), meaning Row By Agonizing Row. However, if a cursor must be used, then use a cursor with the least cost....
Causes statements that may differ in some literals, but are otherwise identical, to share a cursor, unless the literals affect either the meaning of the statement or the degree to which the plan is optimized. (3)EXACT Only allows statements with identical text to share the same cursor. ...
The cursor is created with an initial mode ofQ3SqlCursor::Writable(meaning that records can be inserted, updated or deleted using the cursor). If the cursor does not have a unique primary index, update and deletes cannot be performed. ...
Specifies that the result table of the cursor is dynamic, meaning that the size of the result table might change after the cursor is opened as rows are inserted into or deleted from the underlying table, and the order of the rows might change. Rows that are inserted, deleted, or updated ...
scrolloptandccoptare useful when the cached plans are preempted for the server cache, meaning that the prepared handle identifying the statement must be recompiled. Thescrolloptandccoptparameter values must match the values sent in the original request tosp_cursorprepare. ...
Causes statements that may differ in some literals, but are otherwise identical, to share a cursor, unless the literals affect either the meaning of the statement or the degree to which the plan is optimized. (3)EXACT Only allows statements with identical text to share the same cursor. ...
SQL is a set-based language, meaning operations are completed on all or rows of the result. However, there are times, when you want to do operation on a row by row basis. This is where cursors come in to play. What is a Database Cursor?