> This is a common problem with some solution[color=blue]>>[/color]/************************************************** *********************************** Problem:* Determine the Duplicated Records in a table using single SELECT.** We shall be using Northwind database, add some duplicate records.** Here we want to know if 2 columns (CompanyName,* PHone) are duplicated in a table.*** ShipperID CompanyName Phone* ----------- ------------------------- ------------------* 1 Speedy Express (503) 555-9831* 2 United Package (503) 555-3199* 3 Federal Shipping (503) 555-9931* 4 Federal Shipping (503) 555-9931* 5 Speedy Express (503) 555-9831* 6 Federal Shipping (503) 555-9931***************************************************** **/================================================== SOLUTION 1: Gives me the IDs that are duplicated.================================================== SELECTShipperID, CompanyName, PhoneFROMSHIPPERSWHEREEXISTS (SELECTNULLFROMSHIPPERS bWHEREb.CompanyName = SHIPPERS.CompanyNameAND b.Phone = SHIPPERS.PhoneGROUP BYb.CompanyName, b.PhoneHAVINGSHIPPERS.ShipperID < MAX( b.ShipperID ))/* ********************* Output results********************/ShipperID CompanyName Phone----------- ----------------------------------------------------------------1 Speedy Express (503) 555-98313 Federal Shipping (503) 555-99314 Federal Shipping (503) 555-9931(3 row(s) affected)================================================== ===========SOLUTION 2: Gives me the data which are duplicate butnot the IDs================================================== ===========SELECTCompanyName, PhoneFROMSHIPPERSGROUP BYCompanyName, PhoneHAVINGCOUNT(*) > 1/* ********************* Output results********************/CompanyName Phone---------------------------------------- ------------------------Speedy Express (503) 555-9831Federal Shipping (503) 555-9931(2 row(s) affected)
What is the most reliable way to determine the last LSN of a database? I've looked in sys.database_files to no avail. I've also looked in msdb.dbo.backupset which is accurate but only based on backups already performed not the current state of the database.
I am trying to establish the date a database was last used.
At first i checked out sp_helpfile and sysfiles to see if there was a date last modified, i also tried using xp_cmdshell to check the date on the actual .mdf or .ldf on the o/s but if the file has not grown the date will be the create date.
I need to establish the date a database was last used, either the last time someone logged into it or the last time any sort of command was run against the database, i cannot use sysprocesses as there are no connections to the database, so i need to determine the last time there actually were any processes run against this database.
And i need to use tsql, checking audit logs etc is not viable, can anyone help ?
Does anybody know of a way to determine the last date/time a table has been accessed (query/update)? I've done enough research to know that this isn't easy. However, perhaps somebody has figured out a way through some of the stats that SQL Server keeps to determine the last access of a table. I have recently been put on a team that had no DBA and has a number of databases out there. They would like to determine which databases are inactive and get rid of them. I am a developer and haven't had much SQL Server Administration experience. Any info will help greatly! Thanks!
I am working on Sql Server 2012. and I have multiple databases there. Out of those, i want to move one of my databases to other SQL server 2012, For that i was trying to get approximate size of my database on current server. As i don't have the admin rights, so i can't get that. Can i get the approximate size by right clicking on database and by using the size property Under Database category to get the size idea?
Is it possible to determine the data flow within a database? e.g. I start by adding/inserting a record in MainTable1, then through a trigger SubTable1, SubTable2 have records inserted into, SubTable3 has a record updated into, then a StoredProcedure1 is run which updates first SubTable4, then a StoredProcedure2 is run which adds a record in SubTable5. So by simply adding a record in MainTable1, I affect 5 other tables.
Imagine a more complex process than this one now (which I'm currently facing and I want to win time and precision; I will still investigate it myself (if I will find an answer first - I will post it here)) Is there a way I could "extract" this flow by using T-SQL?
Hi All,I have to a few backups restored from a set of backup files. Thebackup files have been removed from the drive because of some storageconstrains...For some data comparison reasons, I need to figure out the actual dateof these backup files that is used to restore these databases. Isthere any system table I can query to figure the actual backup timesof these databases...Any help will be much appreciated.. Thanks in advance.- Aravin
Does anyone know a way (a query perhaps?) to determine which logins have write permissions to a specific database on SQL Server 2005? Ive thought about joining sys.syslogins & sys.sysusers but looking at the columns, not sure which one would render me that info.
Just found that my tempdb is always full whenever I run a query against a large database. Could please any experts here give me any advices on what is tempdb database used for and how to determine what files can be deleted from it?
I am looking forward to hearing from you and thanks a lot in advance.
I was wondering if there was another method to determine when a database was last backed up without using the backup history tables in msdb? whether using DBCC DBINFO, DBCC PAGE on a specific database page...etc.
Also, when restoring a database, is there a trace flag you can use to force restore details to be written to the error log?
Hi, I already submitted this type of question before and i receive reply. But unfortunately i found out errors when performing on my system.
My problem regarding to this one:
Suppose i have two databases with same tables with different records and I would like to copy the records from one database to another data and vice-versa. So that both the tables contains same number of records inside the tables.
Example:
Database1 (EmployeeTable) contains 6 records. Database2 (EmployeeTable) contains 10 records.
It should copy only those records which is not present in each other database. No duplicate records.
Before i was recommend to use Primary key, if it is not present use index.
writing the query for the following, I need to collapse the continuity. If the termdate for an ID is one day less than the effdate of the next id (for the same ID) i need to collapse the records. See below example .....how should i write the query which will give me the desired output. i.e., get min(effdate) and max(termdate) if termdate is one day less than the effdate of next record.
hi all, How do i avoid duplicate records on my database? i have 4 textboxes that collect user information and this information is saved in the database. when a user fills the textboxes and clicks the submit button, i want to check through the database if the exact records exist in the database before the data is saved. if the user is registered on the database, he wont be allowed to login. how can i acheive this? i thought of using the comparevalidator but i'm not sure how to proceed. thanks
I am using this code to delete records from a table in the database that has two fields (both are primary keys) I am not getting any error, but nothing gets deleted. Thanks for the help. Code:protected void btnRemove_Click(object sender, EventArgs e) {
Hello. I need to design a database structure that will keep ALL table records and not delete anything. Every record will have associated users, but I need to keep perminant track of what every user did to any record. Can you suggest a reading or backup method? Should I keep older versions of a record within the same table or move them to another? Or backup to log files? Any suggestions? Thank you in advance - Jasem
i have duplicate records, but they have unique ids.
the duplicates resulted as a result of using a view to enter the data using BCP to load data from text file that had many dulicate records as part of consolidting the data i would like to get rid of the duplicate
is there some way of checking if the Name, Address, Telephone and Image are the same as on a record with another then remove them.
How to use db-lib to update/insert database records without using SQLlanguage. I want to change the value of the data individually withoutplugging in the new values in the SQL language then execute it. Theperfect situation for me is loop through the retrieved records thenedit the values individually until EOF.Thanks,Carlo
I have a question about new record insertion. I have a SQL Database that I have cofigured as a publisher for a mobile database. I want to be able using the PDA to insert new Customers and synchronize the CE database with the SQL DB. But I encounter a problem with the column field rowguid that SQL inserts as a unique indentifier during the publication. It cannot accept null values and I can't insert a value using the keyboard since the value is generated by SQL.
So my impression is that you cannot use PDA to insert new records, only to update old ones. Is that true or I miss something??
I have an incident reporting management application. People are supposed to report incidents by this application and every time some one reports an incident, they also select thier employee#(reqiured field). so how can write an sql statement that returns only the Top 5 incident reporters i.e going by employee number. Iam thinking of applying a COUNT function on the incident_id and grouping by Employee# but then how do i make sure that only the top 5 incident reporters are returned.
