using "USE" keyword Vs. full table name in T-SQL
Feb 18, 2014 · I'd tend to use [server].[database].[schema].[table] in instances where a script may query mutliple tables from multiple databases. The USE [database] would typically be used in scenarios …
sql - What is SELF JOIN and when would you use it? - Stack Overflow
Jun 13, 2024 · You use a self join when a table references data in itself. E.g., an Employee table may have a SupervisorID column that points to the employee that is the boss of the current employee. To …
How to declare variable and use it in the same Oracle SQL script ...
The question is about to use a variable in a script means to me it will be used in SQL*Plus. The problem is you missed the quotes and Oracle can not parse the value to number.
sql - Can I use multiple "with"? - Stack Overflow
Nov 24, 2015 · These are CTEs - Common Table Expressions. They are more like... named queries that you can use as if they were tables... or rather more like views. Please google them. They are neat. It …
How do I perform an IF...THEN in an SQL SELECT?
Sep 15, 2008 · I prefer the conciseness when compared with the expanded CASE version. Both IIF() and CASE resolve as expressions within a SQL statement and can only be used in well-defined …
How to use SQL LIKE condition with multiple values in PostgreSQL?
Is there any shorter way to look for multiple matches: SELECT * from table WHERE column LIKE "AAA%" OR column LIKE "BBB%" OR column LIKE "CCC%" This questions applies to PostgreSQL ...
sql server - sql use statement with variable - Stack Overflow
Within SQL, you've only got the sp_sqlexec approach; the other option is to construct the SQL sequence of USE/SELECT externally. You'll still need to construct the SQL by hand but, on the plus side, your …
When to begin T-SQL query with USE? - Stack Overflow
Jan 4, 2010 · The USE statement changes the current database for the connection, so if one statement expects to run in the MyDatabase database (but doesn't specify it with a USE MyDatabase …
Should I use != or <> for not equal in T-SQL? - Stack Overflow
I have seen SQL that uses both != and <> for not equal. What is the preferred syntax and why? I like !=, because <> reminds me of Visual Basic.
How to read SQL Table data into a C# DataTable - Stack Overflow
May 20, 2011 · I've read a lot of posts about inserting a DataTable into a SQL table, but how can I pull a SQL table into a C#/.NET DataTable?