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 …
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.
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...
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...
mysql> SELECT CONCAT_WS(',','First name','Second name','Last Name')
SELECT CONCAT(login, password) FROM members. Strings without Quotes.
Если параметр SET CONCAT_NULL_YIELDS_NULL установлен в OFF, любое применение инструкций CREATE, UPDATE, INSERT и DELETE к таблицам с индексами на вычисляемых столбцах или к индексированным представлениям завершится...
1 UNION ALL SELECT NULL,concat(0x28,column1,0x3a,column2,0x29) FROM database2.table1--. Error Based.
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