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What happens when an insert is made in the cursor?
Inserts made from inside the cursor are visible at the end of the result set. Updates of key values from outside the cursor resemble a delete of the old row followed by an insert of the new row. The row with the new values is not visible, and attempts to fetch the row with the old values return an @@FETCH_STATUS of -2.
Why is the cursor not able to scroll backward in SQL?
Because the cursor cannot be scrolled backward, however, changes made to rows in the database after the row was fetched are not visible through the cursor. Forward-only cursors are dynamic by default, meaning that all changes are detected as the current row is processed.
What should the default cursor be in Transact-SQL?
If a DECLARE CURSOR using Transact-SQL syntax does not specify READ_ONLY, OPTIMISTIC, or SCROLL_LOCKS, the default is as follows: If the SELECT statement does not support updates (insufficient permissions, accessing remote tables that do not support updates, and so on), the cursor is READ_ONLY. STATIC and FAST_FORWARD cursors default to READ_ONLY.
Is the SELECT statement allowed in the cursor declaration?
Is a standard SELECT statement that defines the result set of the cursor. The keywords FOR BROWSE, and INTO are not allowed within select_statement of a cursor declaration.
When to convert cursor to another type in SQL Server?
SQL Server implicitly converts the cursor to another type if clauses in select_statement conflict with the functionality of the requested cursor type. Prevents updates made through this cursor. The cursor cannot be referenced in a WHERE CURRENT OF clause in an UPDATE or DELETE statement.
Why does cursor not work in SQL Server 2012?
For some reason the other sub-query based answers did not work for me. It kept dropping rows, SQL Server 2012. This particular case was selecting ~100 rows from a view of some static data crossed with table data. The cure was to declare the cursor as ” forward_only static “:
How to fix missing cursor in Windows 10?
Update the Mouse Driver to Fix the Missing Cursor in Windows 10 Since there’s no mouse pointer and the mouse is not working, you can only process updating mouse driver with the keyboard: 1. Press Windows + R keys altogether to bring out the Run box. 2. Type devmgmt.msc and then hit Enter to open Device Manager.
How to sort by Cursor in SQL Server?
Because I need to sort the data first. DECLARE cur CURSOR FOR ( SELECT * FROM ( SELECT TOP 9999999999 — Necessary… col_1 ,… ,col_n FROM TABLE_XY ORDER BY WHATEVER ) AS TempTableBecauseSqlServerSucks ) I am not sure what database you are using but it is possible in SQL Server.