Skip to main content

System Function in SQL-Server

GETDATE() Gives current date time (server’s time zone)

E.g. SELECT GETDATE()return 2011-08-25 09:54:39.963


GETUTCDATE() Gives current date time (GMT + 0 Time zone)

E.g. SELECT GETUTCDATE() return 2011-08-25 04:27:30.163


ISDATE('Value') Returns bool value whether given value is proper date or not

E.g. SELECT ISDATE('2011-08-25') return 1

SELECT ISDATE('2011-13-25') return 0


LTRIM('Value') Trims from left

E.g. SELECT LTRIM(' SQL SERVER ') return ‘SQL SERVER ‘


RTRIM('Value') Trims from right

E.g. SELECT LTRIM(' SQL SERVER ') return ‘ SQL SERVER‘


REPLACE() replace all occurrence of string with other string

E.g. SELECT REPLACE('SQL SERVER ','S','A') return ‘AQL AERVER’


ISNUMERIC('Value') Checks whether given value is numeric or not. Gives Boolean result

E.g. SELECT ISNUMERIC(3) return 1

SELECT ISNUMERIC(‘SQL’) return 0


LEN('Value') Gives total number of characters available in given string (after right trimming)

E.g. SELECT LEN('SQL SERVER') return 10


UPPER('Value') Converts all the characters into upper case

E.g. SELECT UPPER('SqL SErVeR') return ‘SQL SERVER’


LOWER('Value') Converts all the characters into lower case

E.g. SELECT LOWER('SqL SErVeR') return ‘sql server’


SUBSTRING() Gives substring from string with specific position

E.g. SELECT SUBSTRING('SQL SERVER',2,3) return ‘QL’


REVERSE('Value')Gives reverses the string

E.g. SELECT REVERSE('SQL SERVER') return ‘REVRES LQS’

CHARINDEX() Gives position of “characters” in a string starting from specific position

E.g. SELECT CHARINDEX('S','SQL SERVER',2) return 5


SCHEMA_ID('Value') Gives ID of a given schema

E.g. SELECT SCHEMA_ID('dbo') return 1


SCHEMA_NAME('Value') Gives name of a schema with given ID

E.g. SELECT SCHEMA_NAME('1') return 0


SCOPE_IDENTITY()returns the last identity value generated for any table in the current session and the current scope

E.g. SELECT SCOPE_IDENTITY()


IDENT_CURRENT('TableName') returns the last identity value generated for a specific table in any session and any scope

E.g. SELECT IDENT_CURRENT('emp')


ISNULL(ColumnName,'Value') Replaces NULL value of a given column with passed string

E.g. SELECT ISNULL(NULL,'SQL') return SQL

SELECT ISNULL(NULL,NULL)return NULL


Labels:

Comments

Post a Comment

Popular posts from this blog

Connected and disconnected architecture in ADO.Net with Example

Connected Architecture of ADO.NET The architecture of ADO.net, in which connection must be opened to access the data retrieved from database is called as connected architecture. Connected architecture was built on the classes connection, command, datareader and transaction.  Connected architecture is when you constantly make trips to the database for any CRUD (Create, Read, Update and Delete) operation you wish to do. This creates more traffic to the database but is normally much faster as you should be doing smaller transactions. Disconnected Architecture in ADO.NET The architecture of ADO.net in which data retrieved from database can be accessed even when connection to database was closed is called as disconnected architecture. Disconnected architecture of ADO.net was built on classes connection, dataadapter, commandbuilder and dataset and dataview. Disconnected architecture is a method of retrieving a r...
37 comments
Read more

ASP.Net AJAX Interview Questions

What is Ajax? Ajax means " Asynchronous Javascript and XM L". Ajax represents a set of commonly used techniques, like HTML/XHTML, CSS, Document Object Model(DOM), XML/XSLT, Javascript and the XMLHttpRequest object, to create RIA's (Rich Internet Applications). ASP.NET AJAX update only a specified portion of data without refreshing the entire page. The ASP.NET AJAX works with the AJAX Library that uses object-oriented programming (OOP) to develop rich Web applications that communicate with the server using asynchronous postback. What are the different controls of ASP.NET AJAX? ASP.NET AJAX includes the following controls: ScriptManager ScriptManagerProxy UpdatePanel UpdateProgress Timer Describe the technology that makes up AJAX?   AJAX is based on the following web standards: XMLHttpRequest Object JavaScript HTML/DHTML DOM XML CSS What role does the ScriptManager play?   The ScriptManager manages all ASP.Net AJAX resour...
2 comments
Read more

HTTPHandler and HTTPModule in ASP.NET

If you want to implement pre-processing logic before a request hits the IIS resources. For instance you would like to apply security mechanism, URL rewriting, filter something in the request, etc. ASP.NET has provided two types of interception HttpModule and HttpHandler .   The web server examines the file name extension of the requested file, and determines which ISAPI extension should handle the request. Then the request is passed to the appropriate ISAPI extension.  For Example When an .aspx page is requested it is passed to ASP.Net page handler. Then Application domain is created and after that different ASP.Net objects like Httpcontext, HttpRequest, HttpResponse. HTTPModule: -    It's just like a filter. The Modules are called before and after the handler executes . -    HTTP Modules are objects which also participate the pipeline but they work before and after the HTTP Handler does its job, and produce additional serv...
124 comments
Read more