In a lot of places, cursors are used to traverse through a recordset. However, a lot of cursors are defined like this: DECLARE@myCursorCURSORFORSELECT…FROMTABLE OPEN@myCursor --do something CLOSE@myCursor DEALLOCATE@myCursor The above code has several problems: The CURSOR is defined as a ...
As a result, cursors in SQL Server are described as being an iterative query, or a database object used by applications to manipulate data in a set on a row-by-row basis. Cursors are commonly compared to, and contrasted with, WHILE loops, which perform a similar function. Creating a Cur...
SQL Server static cursors are always read-only. Because the result set of a static cursor is stored in a worktable intempdb, the size of the rows in the result set can't exceed the maximum row size for a SQL Server table. For more information, see theworktables section in the Query pr...
No UPDATE, INSERT, or DELETE operations are reflected in a static cursor (unless the cursor is closed and reopened), not even modifications made using the same connection that opened the cursor.Bilješka SQL Server static cursors are always read-only....
Application programming interface (API) server cursors API cursors support the API cursor functions in OLE DB and ODBC. API server cursors are implemented on the server. Each time a client application calls an API cursor function, the SQL Server Native Client OLE DB provider or ODBC driver trans...
SQL Server static cursors are always read-only. Because the result set of a static cursor is stored in a work table intempdb, the size of the rows in the result set cannot exceed the maximum row size for a SQL Server table. Transact-SQL uses the term insensitive for static cursors. Som...
Similar to T-SQL Cursors in SQL Server, PostgreSQL has PL/pgSQL cursors that you can use to iterate business logic on rows read from the database. They can encapsulate the query and read the query results a few rows at a time. All access to cursors in ...
What is the use of a cursor in SQL Server? Cursors are a mechanism to explicitly enumerate through the rows of a result set, rather than retrieving it as such. However, while they may be more comfortable to use for programmers accustomed to writingWhile Not RS.EOF Do ..., they are typ...
Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric Microsoft SQL Server statements produce a complete result set, but there are times when the results are best processed one row at a time. Opening a cursor on a result set allows processing ...
This topic provides reference information about cursor compatibility between Microsoft SQL Server 2019 and Amazon Aurora MySQL. You can understand the differences in cursor support and functionality when migrating from SQL Server to Aurora MySQL.