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...
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Selecting constants without referring to a table is perfectly legal in an SQL statement: SELECT 1, 2, 3. The result set that the latter returns is a single row containing the values.
Yes! I found the error! It's right after the word "find" and before "1"...
Плохо получается, если всю семью на своих плечах тянет один человек. Особенно всё ужасно, если этим...
SELECT 2 AS value UNION ALL SELECT NULL ). SELECT l.* FROM t_left l WHERE NOT EXISTS (.
The tutorial comprises of brief explanation on NULL value, NOT NULL value, NULL keywords and comparison of NULL values.
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Anonymous May 4, 2013 at 12:31 PM. Please give the solutionof modular program to read n numbers and find divisors of each of them.