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expression does not return a valueDECLARE @addr varchar (128)Set @addr = ' initial value 'Select @addr = addr from chinadba1 where UserID = 4Print @addr--Keep the original valueGoIt is important to note that SELECT can also assign the value of the scalar subquery to a variable, and if the scalar subquery does not return a value, the variable is set to a null value.This is exactly the same as using SET assignmentThe concept of scalar quantum query everyone should be unfamiliar, for example, can
, Ss.sum_total_logi Cal_writes from (SELECT s.plan_handle, SUM (s.execution_count) Sum_execution_count, SUM (s.total_elapsed_time) sum_total_elapsed_time, sum (s.total_worker_time) Sum_total_worker _time, sum (s.total_logical_reads) sum_total_logical_reads, sum (s.total_logical_w Rites) sum_total_logical_writes from Sys.dm_exec_query_stats s GROUP by S.plan_handle) As SS Cross APPLY sys.dm_exec_sql_text (ss.plan_handle) T ORDER by Sum_total_logical_reads DESC
Sp_depends ' table name ' But this is a good way to save all the SQL statements from being exported and looking for.However, as a reminder, if you use this table in dynamic SQL in a stored procedure, you are not expected to find it. SELECT name, definitionFrom Sys.all_objects oInner join sys.sql_modules m on m.object_id = o.object_idWHERE (o.[type]= ' P ' or o.[t
Let me show you the picture.
The above figure stored procedure called Mup_geta (I wiped out the name associated with the project)
The above illustration uses the SQL Server Graphics manager's own features to view objects that depend on Mup_geta.
The result was a bit shocking and it didn't list MUP_GETB (I'm using SQL
Based on Spring Boot, use JPA to call the stored procedures of the SQL Server database and return a set of records. springjpa
In the previous article "using Spring Boot and JPA to operate SQL Server database to complete CRUD", we
Create Proc Stored Procedure name(@ Parameter 1 parameter type,@ Parameter 2 parameter type,...--the last line of arguments, don't add a comma, the comma means that there are parameters behind it .)AsSQL commands to executeGOCases:A stored procedure that inserts data into the department table in the example database (which has id,name,direc,note parameters in the table):Use ExampleGOCreate Proc Pro_departme
SQL Server tool for writing stored proceduresThe following are the source code of the two stored procedures:/* ===================================================== ======================================Syntax: sp_geninsert
Table
Name
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) + "" " --datetime when @xtype= - Then "" "+convert (char),'+@name+', +) + "" " --smalldatetime when @xtype= $ Then "" "+convert (char),'+@name+')+ "" " --uniqueidentifier Else @name End End End Fetch Next fromSyscolumns_cursor into @name,@xtype End CloseSyscolumns_cursordeallocateSyscolumns_cursorSet @sql='SET NOCOUNT ON select"'Insert into'+@tablename+'('+@colum
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SQL Server Stored Procedures call COM components
/* -- The following part is completed in VB. First, use VB as the simplest Component Project name: testsqlcom.Class Name: testmath' function, which calculates the result of adding two integersPublic Function addme (A as long, B As long) as longAddme = a + BAfter the
SQL Server 2008 synchronous replication creates new tables/functions/stored procedures (without reinitialization of snapshots)One, in the production environment already has the transaction replication (the replication type is the transactional publication), needs the existing published database to add the table, the vi
After the stored procedure has been written, it is not certain that the requirements of the business logic are fully complied with and can be debugged to determine compliance. Debugging is available through Visual Studio, and there are three debugging methods in Visual Studio.First, the database debugging directly.Second, the application debugging.Third, debug in the SQL
Tags: style os ar sp size on C SQL programStored procedure definition: A set of pre-written T-SQL programs that can implement a functionCategory: System stored procedures extended stored procedures user-defined
Label:A custom stored procedure is called in a SQL Server custom function, and after executing this function, the following prompt is issued: "Only functions and extended stored procedures can be executed from within the function."Reason: The function can only use simple
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Add SQL Server statements and stored procedures to favorites-- ===================================================== ====================-- List all SQL Server tables, field name
To introduce you to the use of if esle in SQL Server stored procedures for your reference. There are two tables in the database, the primary key for table A is automatically growing and is the foreign key of table B and is allowed to be empty
Now you can programmatically insert data into table B, but in your program y
@ @fetch_status BeginIf @ @fetch_status BeginIf @xtype not in (189,34,35,99,98)--timestamp does not need to be processed, image,text,ntext,sql_variant temporarily does not processBeginSet @[email protected]+case when Len (@column) =0 then ' Else ', ' [email protected]Set @[email protected]+case when Len (@columndata) =0 then ' Else ', ' ', ' ', 'End+case when @xtype into (167,175) then "" "" + "[email protected]+ ' + '" "" "--varchar,charWhen @xtype in (231,239) then "N" "+" [email protected]+
This article illustrates the comparison of SQL Server with stored procedures from several perspectives.
Why do ① use stored procedures?
Because it executes faster than SQL statements.
)AsSELECT * from student where ID between @startId and @endIdGo--Call methodEXEC Proc_find_stu 2, 4; 2.3 Stored procedures with input and output parametersCreate proc Getcommentcount@newsid int,@count int OutputAsSelect @count =count (*) from Comment where [email protected]--Call methodDECLARE @newsid int,@count int;Set @newsid = 7;exec getcommentcount @newsid, @count output;Select @count;Print @count; 2.4
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