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'Select specific database objects' Check 'Tables' Mark 'Save to new query window' Click 'Advanced' Set 'Types of data to script' to 'Schema and data' Next, Next. You can now run the generated query on the new database. Option 2 - Export the data you want to move, then import it where you want it: Right click on the database you want to copy
When a database, not limited to a relational database, has a matrix structured data, it can be borrowed this terminology, but there might be a more specifical one. In relational databases , for example, a table is always a matrix, so at each column in a table corresponds a field in a record and at each row corresponds a record: different ...
In order to shuffle the SQL result set, you need to use a database-specific function call. Note that sorting a large result set using a RANDOM function might turn out to be very slow, so make sure you do that on small result sets.
No, 1,000,000 rows (AKA records) is not too much for a database. I ask because I noticed that some queries (for example, getting the last register of a table) are slower (seconds) in the table with 1 million registers than in one with 100. There's a lot to account for in that statement. The usual suspects are: Poorly written query
Using ASP.NET MVC with C#, how do you pass some database records to a View and display them in table form? I need to know how I can transfer/pass some rows of records from a database that have been returned to an SqlDataReader object and pass that object to the View so I can display all the records contained by the object in the View using foreach.
delimiter $$ create definer=`root`@`127.0.0.1` procedure `count_all_records_by_table`() begin declare done int default 0; declare tname char(255); declare table_names cursor for select table_name from information_schema.tables where table_schema = database(); declare continue handler for not found set done = 1; open table_names; drop table if ...
Database size DOES matter in terms of bytes and table's rows number. You will notice a huge performance difference between a light database and a blob filled one. Once my application got stuck because I put binary images inside fields instead of keeping images in files on the disk and putting only file names in database.
Many database vendors offer this feature either out of the box or via an extension. I've successfully used the temporal table extension with PostgreSQL but others have it too. Whenever you update a record in the database, the database holds on to the previous version of that record too.
When I perform SELECT * FROM table I got results like below: 1 item1 data1 2 item1 data2 3 item2 data3 4 item3 data4 As you can see, there are dup records from column2 (item1 are dupped). So how
I have 382 tables in a database. But this query is only returning 270 rows (table information). After removing the where condition I am getting 302 rows. Is it due to the fact that some of the tables information is missing from one of the SYS tables so the joins are omitting them. The database does not contain any system tables. –