SQL Server FOR EACH Loop
SQL is primarily a set-orientated language – it’s generally a bad idea to use a loop in it. In this case, a similar result could be achieved using a recursive CTE:
sql-server
CREATE VIEW must be the only statement in the batch
Just as the error says, the CREATE VIEW statement needs to be the only statement in the query batch. You have two option in this scenario, depending on the functionality you want to achieve: Place the CREATE VIEW query at the beginningCREATE VIEW showing as select tradename, unitprice, GenericFlag from Medicine; with ExpAndCheapMedicine(MostMoney, MinMoney) as ( select max(unitprice), min(unitprice) … Read more
Import / Export database with SQL Server Server Management Studio
Right click the database itself, Tasks -> Generate Scripts… Then follow the wizard. For SSMS2008+, if you want to also export the data, on the “Set Scripting Options” step, select the “Advanced” button and change “Types of data to script” from “Schema Only” to “Data Only” or “Schema and Data”.
When to use SELECT … FOR UPDATE?
The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been deleted is locking them with SELECT FOR UPDATE. However in some systems locking is a side effect of concurrency control, and you achieve the same results without specifying FOR UPDATE explicitly. To solve this problem, Thread … Read more
Cannot Connect to Server – A network-related or instance-specific error
I get the following error when trying to connect to SQL Server: Cannot connect to 108.163.224.173. A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. … Read more
Why does NULL = NULL evaluate to false in SQL server
Think of the null as “unknown” in that case (or “does not exist”). In either of those cases, you can’t say that they are equal, because you don’t know the value of either of them. So, null=null evaluates to not true (false or null, depending on your system), because you don’t know the values to … Read more
Can a foreign key be NULL and/or duplicate?
Short answer: Yes, it can be NULL or duplicate. I want to explain why a foreign key might need to be null or might need to be unique or not unique. First remember a Foreign key simply requires that the value in that field must exist first in a different table (the parent table). That … Read more
Column name or number of supplied values does not match table definition
They don’t have the same structure… I can guarantee they are different I know you’ve already created it… There is already an object named ‘tbltable1’ in the database What you may want is this (which also fixes your other issue):
How to calculate percentage with a SQL statement
I have tested the following and this does work. The answer by gordyii was close but had the multiplication of 100 in the wrong place and had some missing parenthesis.