tag:blogger.com,1999:blog-6082652835152798567.post6668018673146947399..comments2024-03-28T21:41:58.974-07:00Comments on Sql server, .net and c# video tutorial: Coalesce() function in sql server - Part 16Unknownnoreply@blogger.comBlogger5125tag:blogger.com,1999:blog-6082652835152798567.post-54443058791457461322018-08-28T04:48:39.850-07:002018-08-28T04:48:39.850-07:00COALESCE() FUNCTION WORKING IN SSMS 2017 ?COALESCE() FUNCTION WORKING IN SSMS 2017 ?S.Sathishkumarhttps://www.blogger.com/profile/18389061824604547161noreply@blogger.comtag:blogger.com,1999:blog-6082652835152798567.post-3531846930661606082016-12-11T01:48:30.274-08:002016-12-11T01:48:30.274-08:00Whenever you create a table, you add a column(RID)...Whenever you create a table, you add a column(RID) with the datatype timestamp or rowversion.It generate special value that is unique within a given<br />database. Value is set by the database<br />itself automatically every time the record<br />is either inserted or updated,even though<br />the timestamp column wasn’t referred to<br />by the UPDATE statement (you’re actually<br />not allowed to update the timestamp fi eld<br />directly).Then write a query like (Select * from where RID=(Select MAX(RID) from ) )Anonymoushttps://www.blogger.com/profile/08836383713357258413noreply@blogger.comtag:blogger.com,1999:blog-6082652835152798567.post-80534655317148657052016-06-28T08:35:30.389-07:002016-06-28T08:35:30.389-07:00As Best in my Knowledge By Using Identity.
What S...As Best in my Knowledge By Using Identity.<br /><br />What SCOPE_IDENTITY is<br /><br />SCOPE_IDENTITY is:<br /><br />SCOPE_IDENTITY returns the last IDENTITY value inserted into an IDENTITY column in the same scope.<br />SCOPE_IDENTITY returns the last identity value generated for any table in the current session and the current scope.<br />A scope is a module; a Stored Procedure, trigger, function, or batch.<br />Thus, two statements are in the same scope if they are in the same Stored Procedure, function, or batch.<br />The SCOPE_IDENTITY() function will return the NULL value if the function is invoked before any insert statements into an identity column occur in the scope.<br />What IDENT_CURRENT is<br /><br />IDENT_CURRENT is:<br /><br />IDENT_CURRENT returns the last identity value generated for a specific table in any session and any scope.<br />IDENT_CURRENT is not limited by scope and session; it is limited to a specified table.<br />What @@IDENTITY is<br /><br />@@IDENTITY is:<br /><br />@@IDENTITY returns the last identity value generated for any table in the current session, across all scopes.<br />After an INSERT, SELECT INTO, or bulk copy statement completes, @@IDENTITY contains the last identity value generated by the statement.<br />If the statement did not affect any tables with identity columns, @@IDENTITY returns NULL.<br />If multiple rows are inserted, generating multiple identity values, @@IDENTITY returns the last identity value generated.<br />The @@IDENTITY value does not revert to a previous setting if the INSERT or SELECT INTO statement or bulk copy fails, or if the transaction is rolled back.<br />Differences<br /><br />The differences between them are:<br /><br />SCOPE_IDENTITY, IDENT_CURRENT, and @@IDENTITY are similar functions in that they return values inserted into IDENTITY columns.<br />SCOPE_IDENTITY and @@IDENTITY will return the last identity values generated in any table in the current session. However, SCOPE_IDENTITY returns values inserted only within the current scope; @@IDENTITY is not limited to a specific scope. A scope is a module; a Stored Procedure, trigger, function, or batch.<br />Adishhttps://www.blogger.com/profile/15798651141108693886noreply@blogger.comtag:blogger.com,1999:blog-6082652835152798567.post-51131929633248853512016-06-22T12:13:42.569-07:002016-06-22T12:13:42.569-07:00Hii Sir , I antedated one interview recently and t...Hii Sir , I antedated one interview recently and they asked to me how to get the Last updated Record in a table , I also search in Google but i did not find proper explanation , Now a day this question asking <br />and some where i asked from the interviewer how to get , they was telling by using time stamp , please guide me it will help me Thank u Anonymoushttps://www.blogger.com/profile/08398397159201134680noreply@blogger.comtag:blogger.com,1999:blog-6082652835152798567.post-33645849701788234932013-05-27T02:55:28.302-07:002013-05-27T02:55:28.302-07:00Nicely explained . ThanksNicely explained . ThanksFuadhttps://www.blogger.com/profile/07995402663055147388noreply@blogger.com