SQL using If Not Null on a Concatenation - Stack Overflow
If I have the table … This will display Firstname-Middlename-Surname e.g. … The second one (Jane’s) displays correct, however since John doesn’t have a middlename, I want it to ignore the second dash.
sql - Union to handle NULL values - Stack Overflow
select a,b,null,null from table1 union select null,null,c,d from table2 union select null,null,null,null,e,f from table3.
sql - CONCAT'ing NULL fields - Stack Overflow
I have a table with three fields, FirstName, LastName and Email. Here's some dummy data: … Now, if I do: … Vitals for Joe is null, as there is a single null field. How do you overcome this behaviour?
oracle10g - Oracle: Concat with delimiter, but only if... - Stack Overflow
I want to select a concatenation of a couple of fields, but with a separator between them. The separator should only be there if both operands are not null.
Concat Values In MySQL Query(To Handle Null Values)
I am writing a PHP and MySQL application in which i have to concatenate multiple column values into one single column.I would have used the concat() function,but it does not handle null values...
Confusing SQL error in SELECT NULL, *, NULL, NULL - Stack Overflow
The Background I was trying to solve the fourth realistic mission in hackthissite.org, and couldn't figure out exactly what SQL I should inject into the URL to retrieve the list of emails.
4309) UNION ALL SELECT NULL, NULL, CONCAT(0x717a716b71...)
-4309) UNION ALL SELECT NULL,NULL,CONCAT(0x717a716b71,0x4d7a54714455556f4b56,0x7176787a71),NULL,NULL-- Qmdb.
hitman 2 silent assassin--tor--random-agent--level=5--risk=3--tamper...
found 4477 results in all patches.
SQL NULL Values - IS NULL and IS NOT NULL
The IS NOT NULL operator is used to test for non-empty values (NOT NULL values). The following SQL lists all customers with a value in the "Address" field: Example. SELECT CustomerName, ContactName, Address FROM Customers WHERE Address IS NOT NULL