SELECT COUNT(*), 'null_tally' AS narrative FROM us WHERE a IS NULL UNION SELECT COUNT(*), 'not_null_tally' AS narrative FROM us WHERE a IS NOT
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...
Data Found: name= Turning on 'bypass illegal union' and retrying!
gulmeli-ehvalat-and-select-1-from-select-count-concat-select...
mysql> SELECT NULL, 1+NULL, CONCAT('Invisible',NULL)
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1 UNION ALL SELECT NULL,concat(TABLE_NAME) FROM information_schema.TABLES
SELECT column_names FROM table_name WHERE column_name IS NOT NULL
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...