Sql query to select records from 2 tables

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SQL Tutorial - Learn SQL

  http://sql-tutorial.net/
SQL GROUP BY The SQL GROUP BY statement is used along with the SQL aggregate functions like SUM to provide means of grouping the result dataset by certain database table column(s). SQL DISTINCT Learn how to use the SQL DISTINCT clause together with the SQL SELECT keyword, to return a dataset with unique entries for certain database table column(s)

sql server - Join tables in two databases make query slow? is better to partition db? - Database Administrators Stack Exchange

  http://dba.stackexchange.com/questions/75358/join-tables-in-two-databases-make-query-slow-is-better-to-partition-db
Next, indexing starts to come into play - depending on the width of the tables and the numbers of fields, you may want to add indexes on the fields you're using for the join. Q: If I join two tables in the same database with the above query, why is it slow? A: For starters, you're not using a WHERE clause, so SQL Server has to build the complete result set, merging both tables together

SQL to Select a random row from a database table

  http://www.petefreitag.com/item/466.cfm
i need to retrieve the data of 1000 rows at once in the output and when i scroll down to the last row i.e 1000th row then again i need to retrieve another 1000 rows and add it to the output using stored procedures.if any one has any idea please post the query etc. The database struture same for all the clients.My question is how to select a table from all the databaseslike select * from mytable where mytable in ...

VB.NET: How to SELECT records from SQL Database - Fryan's Digital World

  http://www.fryan0911.com/2009/06/vbnet-how-to-select-records-from-sql.html
At the end of this article, you should be able to know how easy to query or SELECT records from SQL server.Note: I assumed that you already installed your SQL Server and Visual Studio .NET.Here is the step-by-step procedure to query from SQL server:1. how can i search a record???i have 2 textboxes where i will put the firstname and lastname of the person i am searching then after clicking the search button.

SQL Server: Select query from one database and insert into a table in another database

  http://www.experts-exchange.com/questions/28352113/SQL-Server-Select-query-from-one-database-and-insert-into-a-table-in-another-database.html
There are obviously many ways to accomplish that, including elaborate UPDATE queries with anywhere from one to numerous REPLACE functions (even within REPLACE functions). I have a simple query I am wanting to insert into a VBSCRIPT .VBS file to run a query against a DB and output the source to a CSV file locally on the computer then email the document to a specific email address with out outlook

  http://javarevisited.blogspot.com/2011/10/selct-command-sql-query-example.html
In this SELECT SQL command tutorial we will see some examples of select command or Select Statement and will write sql queries to demonstrate the result. Pattern matching in SQL queries using LIKE and NOT LIKE LIKE is a pattern matching operator and used to find records which are not exact match but probable match

  http://blog.sqlauthority.com/2013/02/21/sql-server-shortcut-to-select-only-1-row-from-table/
But for me only, when I work with my database, I always have to see the last entry of any table, and as my database is about 5 year older, I have about 1 lakh to 1 crore entries in some of the tables. But to make a generic statement, you can create a stored procedure that accepts parameter and perform what every search you want to do, just put the logic inside the stored procedure, if you think table name will change then make it dynamic sql sp and then execute the sp from keyboard short cuts

mysql - SQL query: Delete all records from the table except latest N? - Stack Overflow

  http://stackoverflow.com/questions/578867/sql-query-delete-all-records-from-the-table-except-latest-n
Without it we'd run into two errors: SQL Error (1093): You can't specify target table 'table' for update in FROM clause - MySQL doesn't allow you to refer to the table you are deleting from within a direct subquery. ); (Normally interpolating a comma-separate list into an SQL statement introduces some risk of SQL injection, but in this case the values are not coming from an untrusted source, they are known to be id values from the database itself.) note: Though this doesn't get the job done in a single query, sometimes a more simple, get-it-done solution is the most effective

  http://blog.sqlauthority.com/2008/10/17/sql-server-get-common-records-from-two-tables-without-using-join/
SELECT column1 FROM table1 INTERSECT SELECT column1 FROM table2 If you want in the output both column1 and column2 from table1 which has common columns1 in both tables. SELECT column1, column2 FROM table1 WHERE column1 IN ( SELECT column1 FROM table1 INTERSECT SELECT column1 FROM table2 ) To do this, make sure your column1 is unique and do not have duplicate records

  http://www.codeproject.com/Questions/444015/Single-SQL-Query-to-delete-records-in-two-tables
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