Db2 12 - Performance

2013年5月16日 — Cursor. SQL Server is built to process sets of data ... LOCAL：區域游標表示該游標只在這個範圍內有效。 ... SCROLL：游標可以任意捲動讀取。 游標型態 ...

Local scroll cursor : Declare Cursor « Cursor « SQL Server / T-SQL Tutorial ; 18.2.6. Four cursors ; 18.2.7. Declare a cursor variable to hold the cursor output ...

The DECLARE [SCROLL] CURSOR FROM syntax allows you to declare a cursor directly with a string expression, so that you do not have to use the PREPARE instruction ...

... cursor-transact-sql?view=sql-server-ver15 1.語法=== DECLARE CURSOR 子句```sql= DECLARE cursor_name CURSOR [ LOCAL | GLOBAL ] [ FORWARD_ONLY | SCROLL ] ...

Valid cursor types include dynamic scroll (default), scroll, no scroll, sensitive, and insensitive. The name and data type of each local variable is derived ...

2024年4月6日 — DECLARE cursor_name CURSOR [ LOCAL | GLOBAL ] [ FORWARD_ONLY | SCROLL ] [ STATIC | KEYSET | DYNAMIC | FAST_FORWARD ] [ READ_ONLY | SCROLL_ ...

With SQL in Datacom , use the SCROLL CURSOR enhancement to the DECLARE CURSOR and FETCH statements to control whether the cursor is scrollable.

Scrollable cursors are a valuable tool for writing applications such as screen-based applications, in which the result table is small and you often move ...

2022年10月14日 — A SQL Server cursor is T-SQL logic to loop through a finite number of rows which are determined by the query that is used to load the cursor.