SQL using If Not Null on a Concatenation - Stack Overflow
SELECT concat_ws('-', Firstname, Middlename, Surname) AS example_column FROM example_table.
sql - MySQL SELECT only not null values - Stack Overflow
SELECT col1, col2, ..., coln FROM yourtable WHERE somecolumn IS NOT NULL. If you want to filter out rows that contain a null in any column then
sql - WHERE all IS NOT NULL - Stack Overflow
It would be something like. SELECT * FROM schedule WHERE ((all)) IS NOT NULL. Do I just remove the all and go..?
Confusing SQL error in SELECT NULL, *, NULL, NULL - Stack Overflow
UNION ALL SELECT NULL, *, NULL, NULL FROM email. I understand what this does and why; the hacker needs to create a query that has the same number
mysql - Return 0 when SELECT COUNT is null - Stack Overflow
SELECT m.id, m.name, m.description, m.directions, COUNT(j.markerid) as marker_jingles FROM markers AS m LEFT OUTER JOIN jingles AS j ON j.markerid=m.id WHERE 1. But am a bit stuck because I cannot figure out how to get it to return rows when the COUNT is 0.
sql injection "union select null" - CodeProject
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...
sql - How return a count(*) of 0 instead of NULL - Stack Overflow
You can't select the values from the table when the row count is 0. Where would it get the values for the nonexistent rows? To do this, you'll have to have another table that defines your list of valid Project and Financial_Year values. You'll then select from this table, perform a left join on your existing table...
PayloadsAllTheThings/MySQL Injection.md at master...
Using UNION SELECT Error Based. This method works if error showing is enabled.
Шпаргалка по SQL инъекциям | DefconRU
Синтаксис: 0xHEX_ЧИСЛО (SM): SELECT CHAR(0x66) (S) SELECT 0x5045 (это не число, а
Заметка про NULL / Хабр | select col from ttt where col is not null
Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.