WebOct 21, 2013 · Using the code. For better understanding I create a table name MyTestTable which has 3 fields. Code (char) Name (varchar) Flag (int) Now i want to update Flag field based on the following business logic: if Name field length >=5 then value will be 1. if Name field length >=3 but < 5 then flag value will be 2. WebMar 4, 2024 · In all cases SQL Server performs best with set based operations where everything happens at once instead of having to process row by row. But as mentioned, for something there may not be an alternative. ... WHILE vs Cursors vs Concatenation Queries. Many DBAs recommend avoiding cursors. Cursors are considered a bad …
diff between cursor based approch and set based..? - SQL Server …
WebSep 12, 2008 · SQL Cursors are fine as long as you use the correct options: INSENSITIVE will make a temporary copy of your result set (saving you from having to do this yourself … WebSQL Server CURSOR Summary: in this tutorial, you will learn how to use the SQL Server cursor to process a result set, one row at a time. SQL works based on set e.g., SELECT statement returns a set of rows which is called a result set. However, sometimes, you may want to process a data set on a row by row basis. This is where cursors come into play. pamm\u0027s house
Why are relational set-based queries better than cursors?
WebMar 15, 2009 · In TSQL, any User Defined Function (UDF) or Cursor that executes on a result set row by row is a procedural approach. For example, if you are querying your … WebJan 18, 2024 · Cursors are an extension to result sets that provide that mechanism. Cursors extend result set processing by doing the following items: Allowing positioning at specific rows of the result set. Retrieving one row or block of rows from the current position in the result set. WebSep 12, 2008 · SQL Cursors are fine as long as you use the correct options: INSENSITIVE will make a temporary copy of your result set (saving you from having to do this yourself for your pseudo-cursor). READ_ONLY will make sure … pamms quality assurance