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mysql - Return 0 when SELECT COUNT is null - Stack Overflow

stackoverflow.com

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.

Replacing NULL with 0 in a SQL server query - Stack Overflow

stackoverflow.com

So the expressions ISNULL(NULL, 1) and COALESCE(NULL, 1) although equivalent have different nullability values. This makes a difference if you are using these expressions in computed columns, creating key constraints or making the return value of a scalar UDF deterministic so that it can be...

sql - WHERE all IS NOT NULL - Stack Overflow

stackoverflow.com

SELECT * FROM `mydata`.`mytable` WHERE CONCAT(<list of columns>) IS NOT NULL.

whatsapp windows 8 problem" and(//select 1 //from(//select count...

1494.kz

mysql> SELECT NULL, 1+NULL, CONCAT('Invisible',NULL); To search for column values that are NULL, you cannot use an expr = NULL test. The following statement returns no rows, because expr = NULL is never true for any expression: Press CTRL+C to copy. mysql> SELECT * FROM my_table...

cql - SELECT in cassandra where id != null - Stack Overflow

stackoverflow.com

Also, if null values are a possibility in your primary key, then you may want to re-evaluate your data model. Again, I know the OP's question is about querying where data is not null. But as I mentioned before, Cassandra CQL doesn't have a NOT or != operator, so that's going to be a problem right there.

sql - MySQL SELECT only not null values - Stack Overflow

stackoverflow.com

SELECT val1 AS val FROM your_table WHERE val1 IS NOT NULL UNION ALL SELECT val2 FROM your_table

cassandra - How Can I Search for Records That Have A Null/Empty...

stackoverflow.com

SELECT * FROM book WHERE author = 'null'

Replace Count* with 0 if Null – SQLServerCentral | Forum

www.sqlservercentral.com

IF EXISTS (SELECT * FROM dbo.table1 WHERE school = 'xxxxxxxxxxxxx'). SELECT COUNT(*) AS thecount.

Шпаргалка по SQL инъекциям | DefconRU

defcon.ru

Синтаксис: 0xHEX_ЧИСЛО (SM): SELECT CHAR(0x66) (S) SELECT 0x5045 (это не число, �� строка) (M) SELECT 0x50 + 0x45 (теперь это число) (M)

Заметка про NULL / Хабр | select col from ttt where col is not null

habr.com

Существуют специальные операторы IS NULL и IS NOT NULL, которые позволяют производить сравнения с NULLами.

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