In T-SQL (Microsoft SQL 2008), how can I make a new database which will have the same schemas, tables, table columns, indexes, constraints, and foreign keys, but will not contain any data from the original database?
Note: making a full copy, then removing all data is not a solution in my case, since the database is quite big, and such full copy will spend too much time.
See here for instructions: How To Script Out The Whole Database In SQL Server 2005 and SQL Server 2008
In SQL Management Studio, right click on the database and select "Script database as"
http://msdn.microsoft.com/en-us/library/ms178078.aspx
You can then use the script to create an empty one.
Edit : OP did say 2008
I use liquibase for this purpose. Just point liquibase to a different server and it will use your changelog to bring the second database up to date, schema wise. It has the added benefit that the changelog file gets stored in source control and so I can have tagged versions of it, allowing me to restore a database to what a specific version of my app is expecting.
Related
I am using Oracle SQL developer, it has the following tools,
DATABASE copy, DATABASE export and Migrate.
I want to move one schema and all the data in it from one server to another.
What is the difference between these options? Does anything serve what I am looking for?
Database Copy is probably what you want.
Supply two database connections, and we'll take objects and data and copy them from one database to another.
However, if your schema is large, this will be inefficient. The Copy routine does inserts, row-by-row across the jdbc connections.
Database Export takes the objects and data and offloads them to flat files. These flat files could then be used later to put in another database.
Migrate is used to take a database from SQL Server, Sybase, Teradata, Redshift, DB2, etc. to Oracle. It has an online (jdbc row-by-row) data copy and an offline (flat files for SQL Loader) data move mode. For SQL Server/Sybase, we can also translate the T-SQL stored procedures to PL/SQL.
Your solution might also lie elsewhere - Data Pump. We have a wizard for that as well, and works great for very large schemas/databases. You'll just need access to the database OS so you can put the DMP files into a Database Directory.
I am new to SSIS and am after some assistance in creating an SSIS package to do a specific task. My data is stored remotely within a MySQL Database and this is downloaded to a SQL Server 2014 Database. What I want to do is the following, create a package where I can enter 2 dates that can be compared against the create date/date modified per record on a number of tables to give me a snap shot and compare the MySQL Data to the SQL Data so that I can see if there are any rows that are missing from my local SQL Database or if any need to be updated. Some tables have no dates so I just want to see a record count on what is missing if anything between the 2. If this is better achieved through TSQL I am happy to hear about other suggestions or sites to look at where things have been done similar.
In relation to your query Tab :
"Hi Tab, What happens at the moment is our master data is stored in a MySQL Database, the data was then downloaded to a SQL Server Database as a one off. What happens at the moment is I have a SSIS package that uses the MAX ID which can be found on most of the tables to work out which records are new and just downloads them or updates them. What I want to do is run separate checks on the tables to make sure that during the download nothing has been missed and everything is within sync. In an ideal world I would like to pass in to a SSIS package or tsql stored procedure a date range, shall we say calender week, this would then check for any differences between the remote MySQL database tables and the local SQL tables. It does not currently have to do anything but identify issues, correcting them may come later or changes would need to be made to the existing sync package. Hope his makes more sense."
Thanks P
To do this, you need to implement a Type 1 Slowly Changing Dimension type data flow in SSIS. There are a number of ways to do this, including a built in transformation aptly called the Slowly Changing Dimension transformation. Whilst this is easy to set up, it is a pain to maintain and it runs horrendously slowly.
There are numerous ways to set this up using other transformations or even SQL merge statements which are detailed here: https://bennyaustin.wordpress.com/2010/05/29/alternatives-to-ssis-scd-wizard-component/
I would recommend that you use Lookup transformations as they perform better than the Slowly Changing Dimension transformation but offer better diagnostics and error handling than the better performing SQL merge statement.
Before you do this you will need to add a Checksum or Hashbytes column to your SQL data for ease of comparison with the incoming MySQL data.
In short, calculate some sort of repeatable checksum as the data is downloaded into your SQL Server, then use this in an SSIS Lookup, matching on the row key, to check for changes. Where the checksum value is different for the same row it needs updating and where there is no matching row key in your SQL Data you need to insert the new row.
Is it possible to have a MS access backend database (Microsoft JET or Access Database Engine) set up so that whenever entries are inserted/updated those changes are replicated* to a PostgreSQL database?
Two-way synchronization would be nice, but one way would be acceptable.
I know it's popular to link the two and use one as a frontend, but it's essential that both be backend.
Any suggestions?
* ie reflected, synchronized, mirrored
Can you use Microsoft SQL Server Express Edition? Or do you have to use Microsoft Access Database Engine? It's possible you'll have more options using MS SQL express, like more complete triggers and logging.
Either way, you're going to need a way to accumulate a log of changed rows from the source database engine, and a program to sync them to PostgreSQL by reading the log and converting it into suitable PostgreSQL INSERT, UPDATE and DELETE statements.
You could do this by having audit triggers in MADB/Express insert a row into an audit shadow table for every "real" table whenever it changed, including inserting special "row deleted" audit entries. Then your sync program could connect to both MADB/Express, read the audit tables, apply the changes to PostgreSQL, and empty the audit tables.
I'll be surprised if you find anything to do this out of the box. It's one area where Microsoft SQL Server has a big advantage because of all the deep Access and MADB engine integation to support the synchronisation and integration features.
There are some ETL ("Extract, Transform, Load") tools that might be helpful, like Pentaho and Talend. I don't know if you can achieve the desired degree of automation with them though.
Originally, I used Data Modelling in MySQL Workbench to design a database consisting of a series of tables (i.e. the columns and relationships).
Then using Database -> Forward Engineer, I created a database, and inserted data into the tables.
Now I've realised that the model I've designed needs some changes, and so I've altered some tables by inserted columns. My question is, how do I get MySQL Workbench to alter the tables?
Using Database -> Synchronize Model, Update Source just generates a bunch of CREATE TABLE IF NOT EXISTS sql statements, and as the tables exist, nothing changes.
What you are looking for is in the model menu Database / Synchronize model.
As I couldn't get get File -> Export -> Forward Engineer SQL ALTER Script to work, so I made a backup of the data, dropped the tables, recreated them, and then imported the data. I'd rather find a way to get MySQL Workbench to generate ALTER commands from the changes in my model
The 2011 answer is no longer up to date. I struggled to find the option in a recent version. Here is the new procedure (works for MySQLWorkbench 6.2 at least):
When you have finished editing your model, open Database -> Synchronize with Any Source
In the step Select Source you have 3 parts
Source : choose Model Schemadata
Destination : choose Live Database Server
Send updates to : choose whether the live database should be updated or if you only want to saves the changes to a .sql file
Proceed in the wizard, you can then review the tables and sql queries that will be executed. You can also ignore the update of some tables.
I know ways to script a SQL CE Database, but does anyone know a way to diff two databases and output a script sync one of them to the other (ie generate drops and inserts to make them the same).
I am looking for a way that I can update my hand held applications without having to copy over the existing database. The first step is to be able to make a change script.
Script the two SQL CE databases, and load them into 2 SQL Server Express tables, and use one of the many SQL Server compare tools to compare these.
Are you trying to copy changes in a local SQLS CE database to another local CE database? Or are you trying to replicate changes between multiple CE clients with internet access? If the latter, check out SQLS CE Merge Replication.