I ve got two tables:
TableA
Col1
Col2
TableB
Col3
Col4
I want to join them together:
SELECT * from TableA join TableB ON (...)
Now, in place of ... I need to write an expression that evaluates to:
What would be the most elegant way to do this?
ON (Col1=Col3 OR (Col3 IS NULL AND Col2=Col4))
should do the trick (if Col3 is null, Col1=Col3 cannot evalutate to TRUE)
Try this:
SELECT *
FROM TableA
JOIN TableB
ON Col1 = Col3
OR (Col3 IS NULL AND Col2 = Col4)
I ve got two tables: TableA Col1 Col2 TableB Col3 Col4 I want to join them together: SELECT * from TableA join TableB ON (...) Now, in place of ... I need to write an expression ...
TSQL query to select all records from Customer that has an Order and also select all records from customer that does not have an Order. The table Customer contains a primary key of CustomerID. The ...
I have a stored procedure which takes an XML parameter and inserts the data into multiple tables. If I run the stored procedure into a database using a SSMS query window, everything works fine. ...
Have a win 2003 box with MSSQL 2005 running on it. There is a database which is populated every morning with new/modified SalesOrder made the previous day. The database has several tables: SalesOrder, ...
I have a table with the following fields Id Name IsPublic i need to write a sql query that updates IsPublic to false where name has a duplicate. Only one of the duplicates should have IsPublic = ...
I have a Transact-SQL query that uses the IN operator. Something like this: select * from myTable where myColumn in (1,2,3,4) Is there a way to define a variable to hold the entire list "(1,2,3,4)"? ...
I ve got a content management system that contains a hierarchical structure of categories, with sub-categories subject to different ordering options at each level. Currently, that s retrieved by a (...
I m trying to transform the SQL Query below into Linq to SQL select Categorias.IdCategoria, Categorias.Nome, SUM(lancamentos.valor) from lancamentos left outer join Categorias on Lancamentos....