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.
How can I run a MySQL query that selects everything that is not null? It would be something like … Do I just remove the all and go..?
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...
mysql> SELECT NULL, 1+NULL, CONCAT('Invisible',NULL)
1 UNION ALL SELECT NULL,concat(0x28,column1,0x3a,column2,0x29) FROM database2.table1--. Error Based.
SELECT column_names FROM table_name WHERE column_name IS NOT NULL
...Null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,concat
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...
...par=1 or (select count(*)from(select 1 union select 2 union select 3)x group by concat(mid((select pass from users limit 1),1
· Using SELECT COUNT(*) or SELECT COUNT(1) (which is what I prefer to use) will return the total of all records returned in the result set regardless of NULL values. · Using COUNT(<Specific Column Name Here>)will count the number of non-NULL items in the specified column (NULL fields will be...