I want to sync my local db with microsoft sql database so I need to know the ids of added records , updated and deleted records after last sync date, I mean I have the last sync date and I need to get all these ids after that date
is microsoft sql server store this information in logs or anywhere ?
This isn't logged anywhere by default unless you either create a mechanism yourself to store the information or perhaps use Change Data Capture as documented here:
Change Data Capture
This allows SQL server to track data that changes in a table and then exposes the changes via functions that you can call to retrieve the data that has changed with each sync.
Related
I am modifying an access 2010 application so that it uses SQL server to run its queries. The data has been transferred to the server some times ago, and used as linked tables, but that proves a bit slow and non-optimal. So I'm trying to put the queries on the server.
I have no problem for simple queries, views,... and I'm using stored functions when there is a need for simple parameters (dates, ids,...).
But now I have a process in that application that selects a bunch of ids in the database, stores them in a local table, does a bunch of actions on them (report with sub report, print preview, print, update of the original records with the date of print when the user confirms that everything printed OK), and empties the local table if all actions succeed.
I can't simply use an SQL server table to store the ids since many people use the application at the same time, and the same table is used in several processes; I can't use temporary tables since they disappear as soon as access goes to the next action; and I can't find a way to use a local table as a parameter to server stored procedures. Basically I'm stuck.
Can anyone help? Is there a way to do that (pass a bunch of values as a table to a server stored function)? Or another process that would achieve the same result (have a table on the server specific to the current user, or a general table and somehow identify the lines belonging to current user, or anything else)?
There are 2 methods that I use. Both work very well for multi-user apps. Here are the basics. You'll need to work out the details.
Create a table (tblSessions) in SQL Server with an identity column SessID (INT NOT NULL).
Create a function in Access to generate and retrieve a new SessID.
Create a second SS table tblWork with 2 columns SessID, YourID. Add appropriate indexes and keys. Link this table to your Access app. Then instead of inserting the IDs for your query into an Access temp table, insert them into tblWork along with a new SessID. You can now join tblWork to other SS tables/views to use as the datasource for you reports. Be sure to add the SessID that you generated to your where clause.
Create a stored procedure to generate the data for your reports. Include a parameter #YourIDList VARCHAR(MAX). Call the proc via a passthrough queryand pass the list of your IDs as a comma (or whatever you prefer) separated string to #YourIDList. In the proc, split #YourIDList into a temp table. SS2016+ has a STRING_SPLIT function. For older versions, roll your own. There are plenty of examples available. Then join the temp table to the other tables you need to generate your output. Use the PT query as your report datasource, or dump it into an Access temp table and use that as you report datasource.
Basic idea is we have our Silverlight application, and need to provide data to third party application when user want to send (export) a record of T_MainList
We maintain our data in Oracle and third party's SQL Server, third party people are providing us access to write a stored procedure, and a web service if needed.
Same table schema is maintained on both databases (Oracle and SQL Server), need to copy a record of T_MAINLIST on user request and it has other dependent data sublist can have multiple records and each sublist record can have multiple subsublist records
Is serializing data of whole dataset as xml and send them in stored procedure. De-serialized data in stored procedure (on SQL server) and insert data into the appropriate tables good idea?
Oracle has the possibility to directly connect to another database, see the example for MS SQL server here. That should be faster then using xml ex- and import...
How to find the creator of a column in SQL Server?
I checked sys.column table but only getting the created and modified date. With these two fields I also need the Creator of the column.
By Creator I mean the userid which is used to login to sql server.
Possibly you can not but if you change the column recently than you can try to find it in the below way
This report provides a history of all committed DDL statement executions within the Database recorded by the default trace.
I have a database called AQOA_Core with huge amount of data.
I have a newly created database called AQOA_Core1 which is basically empty. I want to write a query to duplicate AQOA_Core to AQOA_Core1 without the data. I guess to be precise I want to create a skeleton of the primary database into the secondary database.
PS: I use Toad for my database operations.
You can use SQL Server Script Wizard for scripting database objects. You can exclude data, and select the database object types you want to include in your script
Please check the SQL Server guide I referenced above,
I hope it helps you
I am working with sensitive/private files stored in SQL Server as VarBinary(MAX). Is there a way to tell the database or nHibernate to nullify the column after a period of time after its creation.
Make sure to put a timestamp column on the table, then set up a SQL Scheduled Job with a query to delete those rows periodically based on that time.
Absolutely not
Imagine the fun when SQL Server decides to change data apparently on it's own because the code monkey fluffed setting up whatever mechanism would be used...
You could (off top of my head):
Encrypt the columns
Schedule a clean up (SQL Agent job, a config table)
Don't use SQL Server for the files themselves, just store paths/links