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Нашёл 11 млн ответов for 'shareit UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- budO'.

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...

https://www.codeproject.com/Questions/439817/sql-injection-union-select-null

How to select null when the record does not exist with UNION ALL?
How can I make the SELECT UNION display a NULL instead of a blank when the record does not exist? Is it possible to do the same but when I require a JOIN with several tables? Let's say that I need to extract the number of subjects that is in another table X (therefore due to make a JOIN between the...

https://stackoverflow.com/questions/48964459/how-to-select-null-when-the-record-does-not-exist-with-union-all

sql - MySQL SELECT only not null values - Stack Overflow
You should use IS NOT NULL. (The comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.) A couple of other ways of doing it though... SELECT val1 AS val FROM your_table WHERE val1 IS NOT NULL UNION ALL SELECT val2 FROM your_table WHERE...

https://stackoverflow.com/questions/5285448/mysql-select-only-not-null-values

sql - WHERE all IS NOT NULL - Stack Overflow
SELECT * FROM SCHEDULE WHERE coalesce(ID, FOO, BAR) IS NOT NULL; inconsistent datatypes: expected CHAR got DATE Note: here FOO is of date This at least works on other versions of SQL, and some compilers will expand it to a series of IS NOT NULL. Just do what the accepted answer says.

https://stackoverflow.com/questions/3108262/where-all-is-not-null

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Обсуждение: BUG #1453: NULLs in UNION query
SELECT NULL AS Test UNION ALL (SELECT NULL UNION ALL SELECT 0). The problem is that transformSetOperationTree() resolves the column datatypes one UNION pair at a time, and so the two NULLs default to "text" before we ever look at the zero. It's probably possible to rejigger it so that the...

https://postgrespro.ru/list/thread-id/1203079

SQL - NULL Values - Tutorialspoint
SQL - NULL Values - The SQL NULL is the term used to represent a missing value. A NULL value in a table is a value in a field that appears to be blank. SQL> create table customers( ID int not null, name varchar (20) not null, age int not null, address char (25)...

https://www.tutorialspoint.com/sql/sql-null-values.htm

SQL NULL Values - IS NULL and IS NOT NULL
A field with a NULL value is a field with no value. If a field in a table is optional, it is possible to insert a new record or update a record without adding a value to this It is not possible to test for NULL values with comparison operators, such as =, <, or <>. We will have to use the IS NULL and IS NOT NULL...

https://www.w3schools.com/sql/sql_null_values.asp

MySQL/Language/Using NULL - Wikibooks, open books for an open...
MySQL/Language/Using NULL - Wikibooks, open books for an open...

https://en.wikibooks.org/wiki/MySQL/Language/Using_NULL

isNull - Bohemia Interactive Community
Checks whether the tested item is Null. Which null type the item has to be equal to depends on the type of game entity tested

https://community.bistudio.com/wiki/isNull