sql server format function

('//action[@name = ' client_app_name ']/value '). Value (' (value) [1] ',' NVARCHAR (100) ')--Get Sql_textSET @sql_text = @xmlData. Query ('//action[@name = ' sql_text ']/value '). Value (' (value) [1] ',' NVARCHAR (MAX) ')--Start inserting dataINSERT #MyData(database_id,Sql_text,UsernameClient_hostname,Client_app_name,Cpu_time)VALUES (@database_id,--Database_id-int@sql_text,--Sql_text-nvarchar (max)@username,@client_hostname,@client_app_name,@cpu_time)END TRYBEGIN CATCHEND CATCHFETCH NEXT from

In-depth analysis of the nvl function of Orcale and the isnull function of SQL Server, orcalenvl Nvl function of Orcal NVL (Expr1, Expr2) If Expr1 is NULL, the value of Expr2 is returned. Otherwise, the value of Expr1 is returned. If both Expr1 and Expr2 are NULL, NULL is

The NVL function of orcalNVL (EXPR1,EXPR2) If EXPR1 is null, returns the value of EXPR2, otherwise returns the value of EXPR1, EXPR1,EXPR2 null returns null nvl2 (EXPR1,EXPR2,EXPR3) If EXPR1 is null, Returns the value of EXPR2, otherwise returns the value of EXPR3 nullif (EXPR1,EXPR2) If the values of EXPR1 and EXPR2 are equal, returns NULL, Otherwise returns the value of Expr1 coalesce (Expr1, EXPR2, Expr3 ..... EXPRN) represents a placehol

Lazy to find a ready-made function, it turns out that the people writing SQL Server than I am lazy, even this basic function is not! Good, because all I want is the serial number and it will be reset every month, and the maximum ordinal will not exceed 100,000. So let's use rigth: DECLARE @SN int DECLARE @SNLen int

Create FUNCTION InsertComp (@ in varchar (30 ))RETURNS varchar (30)ASBEGINDeclare@ Pos int,@ Count int,@ Result varchar (30 ),@ Len intSet @ result = @ in-- The position before the pointSet @ pos = CHARINDEX ('.', @ result)-1If (@ pos =-1) set @ pos = len (@ result)Set @ count = @ pos-3While (@ count> = 1)BeginSet @ len = len (@ result)-@ countSet @ result = left (@ result, @ count) + ',' + substring (@ result, @ count + 1, @ len)Set @ count = @ count

Today, I used the attach function of SQL Server 2008 to attach a database. A problem occurred. The error message is: Unable to open physical file "D: \ Documents ents \ dalt \ XXXX. MDF" Operating System Error 5: "5 (error not found)" (Microsoft SQL Server: Error 5120 )". I

Tags: group_concat find_in_set SQL Server emulation MySQLA value in a field that is separated by a commaFind_in_set (' A ', ' a,b,c,d ') with CHARINDEX (', ' + ' B ' + ', ', ', ' + ' a,b,c ' + ', ') > 0 substitutionIi. examples of group_concat that mimic MySQLselectid, val= (select[value]+ ', ' FROMtbASb whereb.id=a.id forxmlpath (') ) Fromtbas a Groupbyid selectid, [val]=stuff ( (select ', ' +[valu

Select Name,salespersonid from Sales.Store where Name between ' G ' and ' J ' and SalesPersonID > 283 ORDER by Sal Espersonid,name DESC/ASCThe use of the between of this statement is still very innovative, this between is the beginning of G and J between the beginning, do not know what the Chinese characters will be?Group BY, often with the min max sum avg, with the as name alias. The group by Mate aggregation function is commonly used.When Count (col

. Create a new table for different entities and then connect to the table.Query.The connection can be established in the FROM clause or WHERE clause of the SELECT statement. It may be helpful to indicate the connection in the FROM clause.Separate the join operation from the search condition in the WHERE clause. Therefore, this method is recommended in Transact-SQL.The connection syntax format for the FROM clause defined by the

Label: ------------------date is converted into a month and a day and seconds--------------- Select ' R ' +convert (varchar), GETDATE (), 112)+right (CAST (Power (10,2) as varchar) +datepart (hour, GETDATE ()), 2)+right (CAST (Power (10,2) as varchar) +datepart (minute, GETDATE ()), 2)+right (CAST (Power (10,2) as varchar) +datepart (SS, GETDATE ()), 2)+right (CAST (Power (10,3) as varchar) +datepart (MS, GETDATE ()), 3) SQL

You will encounter tasks such as SQL Server mock data Generation and random padding of numeric column values (such as Integer, date, and time data types), all of which use random numbers. For this reason, this article will briefly summarize the use of random numbers in SQL Server. T-

returned when the argument to the MONTH () function is an integer, that is, SQL Server considers itsis January 1900.· Year ()The year () function syntax is as follows:Year (The year () function returns the years value in Date_expression.Reminder: When using a date

(FName) from T_person WHERE fsalary After executing the above SQL we will get the following error message :The column ' T_person.fcity ' in the select list is not valid because the column is not contained in an aggregate function or a GROUP BY clause.This is because all columns that are not included in the aggregate function must be declared in the GROUP BY clau

206 that is the No. 206 Day of the YearDatePart (' yyyy ', ' 2005-7-25 22:56:32 ') returns a value of 2005 that is 2005Use the CONVERT function in SQL Server to handle date strings:For example, a beginner might write in a format like "2008-2-27":[HTML]View Plaincopyprint? Select CONVERT (varchar (4), Year (GE

Deep Learning of SQL Server aggregate function algorithm optimization skills, SQL server Aggregate functions are widely used in practical work to cope with various needs. Optimization of Aggregate functions naturally becomes a key point, whether a program is optimized or not

top or rowcount keywords. To retrieve a specific subset of evaluations, you need to use a "derived table" (or a view-based approach). Four new evaluation functions were introduced in SQL Server 2005: Row_number,rank,dense_rank and Ntile. Although these are a significant improvement over the functions provided by SQL Server