sql - DISTINCT for only one column - Stack Overflow
Feb 19, 2017 · SELECT ID, Email, ProductName, ProductModel FROM Products How can I modify it so that it returns no duplicate Emails? In other words, when several rows contain the …
sql - delete all from table - Stack Overflow
what's faster? DELETE FROM table_name; or DELETE FROM table_name where 1=1; why? does truncate table work in access?
sql - Get list of all tables in Oracle? - Stack Overflow
How do I query an Oracle database to display the names of all tables in it?
sql - Can I use multiple "with"? - Stack Overflow
Nov 24, 2015 · sql t-sql sql-server-2008 edited Dec 13, 2019 at 22:35 Esteban Verbel 748 3 20 40
sql - How do I list all the columns in a table? - Stack Overflow
Microsoft SQL Server Management Studio 2008 R2: In a query editor, if you highlight the text of table name (ex dbo.MyTable) and hit ALT + F1, you'll get a list of column names, type, length, …
SQL: How to properly check if a record exists - Stack Overflow
Nov 23, 2010 · While reading some SQL Tuning-related documentation, I found this: SELECT COUNT(*) : Counts the number of rows. Often is improperly used to verify the existence of a …
SQL: IF clause within WHERE clause - Stack Overflow
Sep 18, 2008 · Is it possible to use an IF clause within a WHERE clause in MS SQL? Example: WHERE IF IsNumeric(@OrderNumber) = 1 OrderNumber = @OrderNumber ELSE …
sql - Adding an identity to an existing column - Stack Overflow
Jun 26, 2009 · Here's the trick: you can use SQL Server's ALTER TABLE...SWITCH statement to change the schema of a table without changing the data, meaning you can replace a table …
sql - What is the difference between JOIN and INNER JOIN
SELECT * FROM table INNER JOIN otherTable ON table.ID = otherTable.FK Is there any difference between the statements in performance or otherwise? Does it differ between …
What is the difference between INNER JOIN and OUTER JOIN?
Sep 2, 2008 · What is the difference between INNER JOIN and OUTER JOIN? How do LEFT OUTER JOIN, RIGHT OUTER JOIN, and FULL OUTER JOIN fit in?