Introduction If you’ve been developing in SQL Server for any length of time, you’ve no doubt hit this scenario: You have an existing, working query that produces results your customers or business owners say are correct. Now, you’re asked to change something, or perhaps you find out yo...
Using EXCEPT to compare tables The EXCEPT operator in SQL Server is an alternative to LEFT JOIN preferred by many database specialists for its simplicity, especially when handling non-keyed tables. The query syntax is: SELECT column1, column2, columnN FROM table1 EXCEPT SELECT column1, column...
Whichever method you use to compare tables, they can be hard to remember and fiddly to write. It would be easier if you could put the logic in a function. Then pass the tables and columns you want to compare to that. Enter SQL macros! These enable you to create query templates. At p...
It’s sometimes difficult to know which SQL syntax to use when combining data that spans multiple tables. SQL provides several different statements for performing this type of task; knowing which to apply will yield efficient and correct results. In this article, I’ll discuss some of the more...
How to compare string in PL/SQL -- You just need one equals, not twoIF SHIPMENT_EXPEDITE='PD'THENDBMS_OUTPUT.PUT_LINE('Same');ENDIF; Oracle / PLSQL: REPLACE Function -- https://www.techonthenet.com/oracle/functions/replace.phpREPLACE( string1, string_to_replace [, replacement_string...
For more information about how to map schemas and tables, see Map schemas and Map tables and columns in the dbForge Schema Compare documentation.4. When schema comparison has been configured, click Compare to start comparison. Comparing source control revisionsThe Schema Compare SQL Server ...
Be aware that you can retrieve information from multiple tables in the same query with theJOINkeyword. We encourage you to follow our guide onHow To Use Joins in SQLfor details on how to do this. Removing Duplicate Values withDISTINCT ...
The most straightforward method to compare two strings in SQL is to use standard comparison operators (<, >, =, etc.):SELECT 'Michael' < 'Mike';Here is the result:'Michael' < 'Mike' 1The result of 1 means 'true'. A result of 'false' would show a 0....
This article will look at yet another interesting topic in SQL commonly asked in interviews - How to Compare Dates or Date type date in SQL. We will look at
Extension of the plan will be .sqlplan. In the next step, I’ll run the same query with a different order ID in another query window with its actual execution plan. To compare the execution plan of both query executions simply right click on Execution plan ➜ Compare Showplan It ...