The WHILE loop, according toSQL Server Loop through Table Rows without Cursorarticle, states that a WHILE is faster than a cursor and uses less locks and use less TEMPDB resources. However, WHILE loops are still slow and have a performance impact. If it is a nested loop, it will be even...
I have the following stored process that doesn't work, every time I run it it stays in an infinite loop. The objective of the SP is to go through the table of products for each row to evaluate the result and if the result when counting the rows is greater than 0, the code ...
Converting Cursor to While Loop Now, let us convert the above example toWHILE loop. To convert a cursor to while loop, first you have to find the total number of rows in the table. Then you have to iterate through the table rows using WHILE control-of-flow element till the total row ...
Applies to: SQL Server 2025 (17.x) Preview 'DISABLE_OPTIMIZED_NESTED_LOOP' Instructs the query processor not to use a sort operation (batch sort) for optimized nested loop joins when generating a query plan. This hint name is equivalent to Trace Flag 2340. This hint also applies to ...
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SQL Server adjusts query plan choices based on runtime characteristics. Cardinality estimation approximates the number of rows processed at each step in an execution plan. Inaccurate estimations can result in slow query response time, unnecessary resource utilization (memory, CPU, an...
Now that the tables are loaded, I can perform the search. The search is handled inside the For Each loop, which moves through all rows in the dt table: For Each rw In dt.Rows The next line sets IsMatch to False as the default for each field. IsMatch is a flag that determines whet...
The SQL Server Database Engine uses the following mechanisms to ensure the integrity of transactions and maintain the consistency of databases when multiple users are accessing data at the same time: Locking Each transaction requests locks of different types on the resources, such as rows, pages, ...
In SQL Server 2016 (13.x), when the bulk load operation causes a new page to be allocated, all of the rows sequentially filling that new page are minimally logged if all the other prerequisites for minimal logging are met. Rows inserted into existing pages (no new page allocation) to ...
SQL Server Call stored procedure in loop within stored procedure for each record in a user defined...