BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Retrieving the last record entered.          BorlandTalk.com Forum Index -> Delphi Databases (SQL Servers) View previous topic :: View next topic   Author Message Larry Guest Posted: Thu Jun 08, 2006 10:50 pm    Post subject: Retrieving the last record entered. CREATE TABLE [dbo].[InjectorRate] ( [TimeRecorded] [datetime] NULL , [InjectedRate] [smallmoney] NULL , [ShiftRate] [smallmoney] NULL , [WorkDate] [datetime] NULL , [Shift] [tinyint] NULL ) ON [PRIMARY] When I run the following ... Select InjectedRate, ShiftRate From InjectorRate Where TimeRecorded = (Select max(TimeRecorded)From InjectorRate) it results in a table lock. All I want is the most recent record added. Is there a better way? DElphi 7 SQL 2003 Back to top Jed Nicolau Filho Guest Posted: Thu Jun 08, 2006 11:13 pm    Post subject: Re: Retrieving the last record entered. Hi Larry Be careful when using max operator ! All table is locked as design if no index for this column is defined but this behavior can change between different database systems. Best Regards Jed "Larry" <lkillen (AT) charter (DOT) net> escreveu na mensagem news:44886350$1 (AT) newsgroups (DOT) borland.com... Quote: CREATE TABLE [dbo].[InjectorRate] ( [TimeRecorded] [datetime] NULL , [InjectedRate] [smallmoney] NULL , [ShiftRate] [smallmoney] NULL , [WorkDate] [datetime] NULL , [Shift] [tinyint] NULL ) ON [PRIMARY] When I run the following ... Select InjectedRate, ShiftRate From InjectorRate Where TimeRecorded = (Select max(TimeRecorded)From InjectorRate) it results in a table lock. All I want is the most recent record added. Is there a better way? DElphi 7 SQL 2003 Back to top Jed Nicolau Filho Guest Posted: Thu Jun 08, 2006 11:16 pm    Post subject: Re: Retrieving the last record entered. Hi Larry Create a column as Primary Key or a Datetime(with now in Insert event) then the select statement is just : "select max(maycolumn) from table". Best Regards Jed "Jed Nicolau Filho" <jed (AT) prouser (DOT) com.br> escreveu na mensagem news:44886814 (AT) newsgroups (DOT) borland.com... Quote: Hi Larry Be careful when using max operator ! All table is locked as design if no index for this column is defined but this behavior can change between different database systems. Best Regards Jed "Larry" <lkillen (AT) charter (DOT) net> escreveu na mensagem news:44886350$1 (AT) newsgroups (DOT) borland.com... CREATE TABLE [dbo].[InjectorRate] ( [TimeRecorded] [datetime] NULL , [InjectedRate] [smallmoney] NULL , [ShiftRate] [smallmoney] NULL , [WorkDate] [datetime] NULL , [Shift] [tinyint] NULL ) ON [PRIMARY] When I run the following ... Select InjectedRate, ShiftRate From InjectorRate Where TimeRecorded = (Select max(TimeRecorded)From InjectorRate) it results in a table lock. All I want is the most recent record added. Is there a better way? DElphi 7 SQL 2003 Back to top Viatcheslav V. Vassiliev Guest Posted: Fri Jun 09, 2006 12:38 am    Post subject: Re: Retrieving the last record entered. select top 1 InjectedRate, ShiftRate from InjectorRate order by TimeRecorded desc Having PK on table would be good. //------------------------------------------ Regards, Vassiliev V. V. http://www.managed-vcl.com - using .Net objects in Delphi for Win32 + ADO.Net http://www.oledbdirect.com - The fastest way to access MS SQL Server, MS Jet (Access) and Interbase (through OLEDB) "Larry" <lkillen (AT) charter (DOT) net> ÓÏÏÂÝÉÌ/ÓÏÏÂÝÉÌÁ × ÎÏ×ÏÓÔÑÈ ÓÌÅÄÕÀÝÅÅ: news:44886350$1 (AT) newsgroups (DOT) borland.com... Quote: CREATE TABLE [dbo].[InjectorRate] ( [TimeRecorded] [datetime] NULL , [InjectedRate] [smallmoney] NULL , [ShiftRate] [smallmoney] NULL , [WorkDate] [datetime] NULL , [Shift] [tinyint] NULL ) ON [PRIMARY] When I run the following ... Select InjectedRate, ShiftRate From InjectorRate Where TimeRecorded = (Select max(TimeRecorded)From InjectorRate) it results in a table lock. All I want is the most recent record added. Is there a better way? 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