I am working on a project where my requirement is just update the database from local server to the destination server (all tables, views, functions, rows and stored procedures).
Now I want to compare the local database table with the destination database table and insert the newly inserted rows from local database to the destination table.
E.g. : I have a database dbsource and dbDestination and both contain a table table1. Now I insert new rows into dbsource.table1.
Now I want to compare both database tables and insert the new rows into the destination table.
Please help me .
Why reinvent the wheel?? There are lots of commercial applications out there that already do this for you:
Red-Gate SQL Data Compare
ApexSQL Data Diff
Assuming both Table1 tables have a Primary Key (unique) column here's how you can implement that. I name the PK column ID:
INSERT INTO DBDESTINATION.<SCHEMA_NAME>.TABLE1
(SELECT T1.* FROM DBSOURCE.<SCHEMA_NAME>.TABLE1 AS T1
LEFT OUTER JOIN DBDESTINATION.<SCHEMA_NAME>.TABLE1 AS T2 ON T1.ID=T2.ID
WHERE T2.ID IS NULL)
Hope that helps.
Related
I have 2 tables in my SQL database:
And I want to merge them in a way the result will be:
This is just an example for 2 tables which need to be merged into one new table (The tables contain an example data, the statement should work for any amount of data inside the tables).
The ID which got different value in CSV should be updated into the new table for example:
ID 3's value is 'KKK' and in table T is 'CCC', then what should be updated is the CSV table.
You seem to want a left join and to match to the second table if available:
select t.id, coalesce(csv.value, t.value) as value
from t left join
csv
on t.id = csv.id;
If you want this in a new table, use the appropriate construct for your database, or use insert to insert into an existing table.
I have two identical tables in my database, T1 and T2. T1 is a local table while T2 is a linked table from a live SQL database. At the moment the two tables are identical.
In short, I would like to be able to run a query that will update T1 will all new records that have been added to T2. So once I have run the query, the two tables should be identical again. Is this at all possible? I need to have the data in T1 locally available as I need to be able to query that table even when the data in T2 is not available. The SQL database in question is off site so I will not always be able to run my queries as the link is unreliable.
Any assistance will be greatly appreciated.
If you do have a unique ID for every record and are sure records already entered will never be changed this can actually be quite simple:
INSERT INTO [TBL_INVOICES_LOCAL]
SELECT TBL_INVOICES.*
FROM [TBL_INVOICES_LOCAL] RIGHT JOIN TBL_INVOICES ON [TBL_INVOICES_LOCAL].InvoiceID = TBL_INVOICES.InvoiceID
WHERE ((([TBL_INVOICES_LOCAL].InvoiceID) Is Null));
All you need to do is join the two tables with the relationship being set to:
Include ALL records from LINKED_TABLE and only records from LOCAL_TABLE where the joined fields are equal.
Setting the criteria of the Local Tables ID field to "Is Null" will only show missing records. If you do this in an append query you can update your table in only one query as seen below:
Using Microsoft SQL server 2017, I want to merge two tables into a 3rd table.
Is there a way to have it defined automatically, without a query?
If it is not possible, I would like to mention that both tables contain a large amount of columns, therefore I look for an efficient query that will not make me write each column name.
Demonstration:
Original tables are Table1,Table2, column structure is as below:
Table1:
(Column1,Column2,Column3)
Table2:
(Column4,Column5,Column6)
My goal is to create Table3. Table3 is based on Table1 LEFT JOIN Table2 ON Column1=Column4.
Table 3:
(Column1,Column2,Column3,Column4,Column5,Column6)
Create it as a view.
CREATE VIEW table3 AS
SELECT Column1,Column2,Column3,Column4,Column5,Column6
FROM Table1 LEFT JOIN Table2 ON Column1=Column4
You can then reference table3 in other queries exactly like an ordinary table.
I have two tables in two Databases having identical schema. The two databases are on different servers at different location. Now the data can be inserted and updated in any of the two databases table. The requirement is to sync the two tables in different databases so that they are always having the updated information.
The primary key column will always be unique in either database table.
How to achieve this via SSIS ?
Kindly guide.
You can achieve it with 2 Script Tasks. In the first one:
-- what exists in A and not in B
SELECT * INTO DB1.temp.TBL_A_except FROM
(
SELECT pk FROM DB1.schema1.TBL_A
EXCEPT
SELECT pk FROM DB2.schema2.TBL_B
);
-- what exists in B and not in A
SELECT * INTO DB2.temp.TBL_B_except FROM
(
SELECT pk FROM DB2.schema2.TBL_B
EXCEPT
SELECT pk FROM DB1.schema1.TBL_A
);
Second one:
INSERT INTO DB2.schema2.TBL_B
SELECT * FROM DB1.temp.TBL_A_except;
INSERT INTO DB1.schema1.TBL_A
SELECT * FROM DB2.schema2.TBL_B_except;
DROP TABLE DB1.temp.TBL_A_except;
DROP TABLE DB2.schema2.TBL_B;
If you really want to achieve this with SSIS transformation techniques, I'd use two data flows with 2xCache Connection Manager as our temp table 1 and 2. First one to save data into cache, second to load from cache into tables.
or
Two data flows. Source -> Lookup -> Destination.
Implement lookup to check the second table for existance of PK. If for a record Tbl_A there is no such PK in Tbl_B it means you have to insert this row into Tbl_B. No Match Output, directs row to Destination.
I have two tables.
Table1
------
ID(identity column)
Name
FC
Table2
------
ID
Name
I need to insert the values for Table1 from Table2
Table 2 will have 1000 records.
So I am using insert sql server 2008 statement.
I an using
insert into Table1(Name,FC)
select Name, SELECT value as FC from Table2
The value in FC should be generated manually.
I need to check the value generated in FC does not already exists in the database.if it is it should create a new value for FC and insert
I am working on scalar functions.
Any ideas will be appreciated.
In this scenario, you can use unique Identifier i.e. NEWID() in sql server....The major advantage of using GUIDs is that they are unique across all space and time. This comes in handy if you're consolidating records from multiple SQL Servers into one table, as in a data warehousing situation. GUIDs are also used heavily by SQL Server replication to keep track of rows when they're spread out among multiple SQL Servers....
You can implement guid in your query by following way.......
INSERT INTO Table1(Name,FC)SELECT Name, NEWID() from Table2