For stored procedures that return both a return value (for example, an integer return value) and have output or input_output parameters, the function signature in the SQL Call Description File is different from the signature that is used to write queries that access the stored procedure. If ...
The WITH RECOMPILE option prevents reusing the stored procedure execution plan, so SQL Server does not cache a plan for this procedure and the procedure is always recompiled at run time. Using the WITH RECOMPILE option can boost performance if your query will vary each time it is run from t...
Say I have a basic SQL table (@Reg A) that stores registrations with the fields: ID (can be duplicates), pre_status and post_status. I'm looking to tally up a bunch of the IDs for different situations. Some of the queries are very basic, like the number of IDs where pre_status i...
https://www.sqlshack.com/using-sp_executesql-stored-procedure-for-executing-dynamic-sql-queries/
Queries which substitute place holders in place of actual values are called Prepared statements A prepared query is paramaterized and can be reused for a range of different inputs (1)预定义语句包含的形式 1、预定义 command.CommandText="SELECT*FROMdbo.UsersWHEREUserID=@UserIDANDPassowrd=@Passowrd...
Creating Stored Procedures Now that we have seen an example, let’s look to see what it takes to create one for ourselves. When writing stored procedures, remember most SP’s purpose is to run queries! Given this, SQL such as SELECT statements, make up a majority stored procedure’s code...
Stored procedure queries can't be paged withSetFirstResult()/SetMaxResults(). Recommended call form is dependent on your database. For MS SQL Server useexec functionName <parameters>. For Oracle the following rules apply: A function must return a result set. The first parameter of a procedur...
SqlQueryRawallows for dynamic construction of SQL queries, just likeFromSqlRawdoes for entity types. Executing non-querying SQL In some scenarios, it may be necessary to execute SQL which does not return any data, typically for modifying data in the database or calling a stored procedure which...
Database Mail stored procedures Used to perform e-mail operations from within an instance of SQL Server. Database Maintenance Plan stored procedures Used to set up core maintenance tasks that are required to manage database performance. Distributed Queries stored procedures Used to implemen...
SQL queries can be used to execute a stored procedure which returns entity data: C# varblogs = context.Blogs .FromSql($"EXECUTE dbo.GetMostPopularBlogs") .ToList(); Note FromSqlcan only be used directly on aDbSet. It cannot be composed over an arbitrary LINQ query. ...