As shown below, I need not null values to be at the start of all output fields.
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.
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?
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.
select cast (2000 as type of quint) from rdb$database select cast (2000 as int) from rdb$database.
CONCAT_WS ignores the SET CONCAT_NULL_YIELDS_NULL {ON|OFF} setting.
Union select null, null, null, null, null, null, null from information_schema.tables. for a small database containing three tables. this instruction is used in sql injection I tried it and it worked but I didn't really know how it works can somebody help me...
What is the difference between … and … and why does the latter not work?
If I have this - tadd is the Address table: … Is there a way to exclude the apt_number if it doesn't exist? I was thinking of: … But it will return only those rows with apt_number...
Note: A NULL value is different from a zero value or a field that contains spaces.