MySQL CONCAT returns NULL if any field contain NULL
I have following data in my table "devices" … I executed below query … It returns result given below … How to come out of this so that it should ignore NULL AND result should be …
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?
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.
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.
group concat - MySQL GROUP_CONCAT with Nulls - Stack Overflow
Is there an option to make MySQL's Group_Concat function include nulls? Consider the following example from my source table: … When I query on the selection table with GROUP_CONCAT...
PayloadsAllTheThings/MySQL Injection.md at master...
MYSQL Union Based. UniOn Select 1,2,3,4,...,gRoUp_cOncaT(0x7c,schema_name,0x7c)+fRoM+information_schema.schemata UniOn Select 1,2,3...
3206) UNION ALL SELECT CONCAT(0x717a716b71...)
-3206) UNION ALL SELECT CONCAT(0x717a716b71,0x58477645644f64504349,0x7176787a71),NULL,NULL,NULL,NULL-- IpiL.
SQL NULL Values - IS NULL and IS NOT NULL
A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this field.