last extracted date and change date

Question

last extracted date and change date

Shambhu Rai 1,411

Hi Expert,

Have loaded data in table for 2 times in a week without date dimension table or last extracted date ... how will i identify last refresh date and current refresh date in sql server

create table emp(employee varchar(23),Age varchar(23),Salary varchar(23))

insert into emp('Test1','23','10')

insert into emp('Test2','25','20')

insert into emp('Tes3','27','30')

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Raksha Chourasia 75 Reputation points

2023-09-18T04:53:19.9433333+00:00

To identify the last refresh date you can check with a query on it.

SELECT name, modify_date

FROM sys.tables

WHERE name = 'emp';

This will help to modify date

For identifying the current refresh date :

You can use the current date and time from the GETDATE() function:

SELECT GETDATE() AS CurrentRefreshDate;

Both codes will help you to do this.
Anonymous

2023-09-18T09:24:48.3966667+00:00

Hi,

You can take a look at the answers below. If it can help you, please accept it.
Erland Sommarskog 121.9K Reputation points MVP Volunteer Moderator

2023-09-18T20:30:34.1+00:00

To identify the last refresh date you can check with a query on it. SELECT name, modify_date FROM sys.tables

Sorry, this is plain wrong. modify_date gives you the most recent schema change on the table, but it says nothing about when data was changed.

1 answer

Your answer

Raksha Chourasia 75 Reputation points

2023-09-18T04:53:19.9433333+00:00

To identify the last refresh date you can check with a query on it.

SELECT name, modify_date

FROM sys.tables

WHERE name = 'emp';

This will help to modify date

For identifying the current refresh date :

You can use the current date and time from the GETDATE() function:

SELECT GETDATE() AS CurrentRefreshDate;

Both codes will help you to do this.
Anonymous

2023-09-18T09:24:48.3966667+00:00

Hi,

You can take a look at the answers below. If it can help you, please accept it.
Erland Sommarskog 121.9K Reputation points MVP Volunteer Moderator

2023-09-18T20:30:34.1+00:00

To identify the last refresh date you can check with a query on it. SELECT name, modify_date FROM sys.tables

Sorry, this is plain wrong. modify_date gives you the most recent schema change on the table, but it says nothing about when data was changed.

Answer 1

Erland Sommarskog 121.9K MVP Volunteer Moderator

If that is all the data you have, the answer is you don't. You will need to arrange for this by adding a datetime column that defaults to sysdatetime() or similar.

Shambhu Rai 1,411 Reputation points

2023-09-15T21:42:23.6033333+00:00

I heard about something called changed table ... how about that
Erland Sommarskog 121.9K Reputation points MVP Volunteer Moderator

2023-09-15T21:46:26.9733333+00:00

There is a function CHANGETABLE which is part of Change Tracking. But Change Tracking only tracks that something has changed, not when.

You may be thinking of temporal tables. With a temporal tables, updated and deleted rows are automatically saved in a history table, and there is specific syntax so you can query how the data was at a certain point in time. Whether that fits your scenario, I don't know. Your question is a bit vague.
Shambhu Rai 1,411 Reputation points

2023-09-15T21:53:45.3533333+00:00

sure can you give me an example for this on my query please CHANGETABLE
Erland Sommarskog 121.9K Reputation points MVP Volunteer Moderator

2023-09-15T21:56:56.5466667+00:00

To be able to use CHANGETABLE, you first need to configure Change Tracking, and I can't see that it is applicable to your case. If you want to learn about the function, mr Google can help you. Which is where I would need to go, if I would have to use it myself; I don't know it by heart. So you may just try yourself.
Shambhu Rai 1,411 Reputation points

2023-09-15T22:25:50.03+00:00

Any other suggestion from other experts on CHANGETABLE please

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last extracted date and change date

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