SELECT CAST (miles AS INT) FROM Flights -- convert timestamps to text INSERT INTO mytable (text_column) VALUES ... Now you can chat with who search for : 999999.9 uNiOn aLl sElEcT cAsT 0x393133353134353632312e39 as char.
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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...
qndbq15bbxilyCzFA') UNION ALL SELECT NULL,NULL,NULL,CONCAT(0x716e646271,IFNULL(CAST(table_name AS CHAR),0x20),0x716a716771),NULL FROM INFORMATION_SCHEMA.TABLES WHERE...
In SQL, a comparison between a null value and any other value (including another null) using a comparison operator (eg =, !=, <, etc) will result in a null, which is considered as false for the purposes of a where clause (strictly speaking, it's "not true", rather than "false", but the effect is the same).
I am getting NULL values in the results of an operation in MySQL. Is there a way to convert the NULL values into the value 0?
SQL supports NULL, a special value that is employed to represent the values of attributes that will be unknown or not apply to a tuple.
I do not want to show revords with null values in any column i only want to only records with data in all column. How can i set that. Please help.
Оператор объединения с NULL ?? возвращает значение своего операнда слева, если его значение не равно null.
The null character (also null terminator or null byte) is a control character with the value zero. It is present in many character sets, including ISO/IEC 646 (or ASCII), the C0 control code, the Universal Coded Character Set (or Unicode), and EBCDIC.