SQL Tutorial - Learn SQL Query Programming Language
This SQL programming help site lists commonly-used SQL statements, and is divided into the following sections: SQL Commands: Basic SQL statements for storing, retrieving, and manipulating data in a relational database. My experience is that understanding the basics of SQL is much easier than mastering all the intricacies of this database language, and I hope you will reach the same conclusion as well
The question is, in ASP.Net, where is the best place to dispose the DataContext ? For now, I do it in a OnDispose() override, is there a better place ? Thanks Skup Skup - Thursday, May 31, 2007 9:11:02 AM Hey Scott, Is there a button in the designer to automatically refresh all the database schema changes into the DAL? (this is a nice feature in LLBLGen) Also - do you have any links for writing my own LINQ to XXXX - where XXXX is the database du jour. Hope this helps, Scott ScottGu - Thursday, May 31, 2007 7:23:08 AM Hi Walter, LINQ ships with XLINQ - and the projection features of LINQ enable you to-do some pretty nice transformations of objects into XML with it
You need lots of tooling to make sure your database keeps working after a schema change, where as if you just used an ORM directly against your tables you'd get a lot of errors immediately if something changes. The companies where I have worked didn't have all those other things you said, so those are all 'if' cases and we're talking about using SPs ALL the time So sure, having SP's is great in case you want to have schema updates
What goes where the hard coded file name was to make the command dynamic? I have a long list of excel files from which I want to lift data and combine on a single summary table. Excel) and I will be putting on a new Business Intelligence Boot Camp April 22-24 in Bentonville Arkansas, where 75 lucky registrants will be getting tips and trick like the one you just learned
So what are we trying to solve? When SQL Server changed its whole licensing process from processor based licensing to core based licensing, a lot of us were confused to how this has to be calculated. I would like to know if anyone has ever tried doing this in your environment? What is the typical reason for you doing the same? I hope this helps incase you get into a tangle like this
Cheers Sam Reply Pravin says: March 14, 2012 at 10:05 am Hi, For inserting the excel data to your SQL table, you can create insert statements in excel file according to your columns. Simplest example is when small or large amount of data needs to be taken out on a removable storage media and copied to a remote location, INSERT..VALUES statements come handy
Result set after the usage of ranking function will look as below with all ranks defined 1 for unique values and all duplicates with values greater than 1
http://javarevisited.blogspot.com/2012/11/how-to-join-three-tables-in-sql-query-mysql-sqlserver.htmlHi all, If I suppose that one employee can belong to severan departments, I would look for employees who do not belong to the sales department, what will be the query? January 1, 2014 at 1:30 PM Emmanuel Ladislaus said... This formula can be extended for more than 3 tables to N tables, You just need to make sure that SQL query should have N-1 join statement in order to join N tables
Go to your table in Object Explorer Right click on table and select Edit Top 200 Rows - In your case number would be changed to what ever you set All record will be opened
SQL Server follows ANSI Entry SQL with regard to referential integrity between PrimaryKey and ForeignKey columns which requires the inserting, updating, and deleting of data in related tables to be restricted to values that preserve the integrity. In the response to my reply I was pointed out to my own blog post where user suggested that I had previously mentioned this is possible and with demo example
Microsoft Access Delete Query, SQL Syntax, Examples and Errors
Store Historic Records in an Archive Table There may be situations where the amount of data is so large that records should be deleted for performance or database size reasons. It's a very powerful feature and a fundamental part of relational databases since you can remove multiple records at one time, and can specify which records to delete by linking to data in another table
mysql - How can an SQL query return data from multiple tables - Stack Overflow
There is a limit which depends on your database, but short of recursive functions of some insane and maniacal programmer, most folks will never hit that limit. Some databases will allow a full outer join which will bring back results (whether matched or not) from both tables, but this isn't supported in all databases
sql server - Delete rows from multiple tables using a single query (SQL Express 2005) with a WHERE condition - Stack Overflow
Now when u delete a record from the master table all other details table record based on the deleting rows primary key value, will be deleted automatically
Now when u delete a record from the master table all other details table record based on the deleting rows primary key value, will be deleted automatically
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