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sql - What is the difference between UNION and UNION ALL?
Compare: select foo.bar from foo union select fizz.buzz from fizz against select case when foo.bar is null then fizz.buzz else foo.bar end from foo join fizz where
SQL Injection Cheat Sheet | Netsparker
11223344) UNION SELECT NULL,NULL,NULL,NULL WHERE 1=2 –- No Error - Syntax is right. MS SQL Server Used.
Заметка про NULL / Хабр
Даже выражение NULL != NULL не будет истинным, ведь нельзя однозначно сравнить одну неизвестность с другой.
Using multilist column as foreign key reference
5 select 4, 'item4', null , null from dual 6 ), 7 remcom 8 -- remove leading and trailing commas 9 as (select id, 10 name, 11 rtrim(ltrim(cola, ' ... ') cola, 12 rtrim(ltrim(colb
Segment purchases based on new vs returning
I was trying to select orders by a date and then join any previous orders on the same user_id from previous dates, then count how many had orders, vs how many didnt. This was my failed attempt: SELECT SUM( CASE WHEN id IS NULL THEN 1 ELSE 0 END ) AS new, SUM( CASE WHEN id IS...
[Solved] Oracle sql or pl/sql: Compute based on... - Code Redirect
SELECT * FROM table_name MATCH_RECOGNIZE( PARTITION BY stock ORDER BY cdate MEASURES
SQL fill empty values in a column based on case when selection
, case when col_a is null and col_b is null and col_C is null and col_D is null and col_e = 0 and col_f = 1 then nvl(col_a, 0.06077) end. The following did fill the entries meeting my set conditions. Anyone knows a potential sollution?
SQL to sum a column while avoiding repeating values — oracle-tech
17 b, 18 decode(a, 19 0, 20 null, 21 sum(b) over(order by rownum rows between unbounded
SQL Plus no rows selected error;though the data has... - Marmaristurunc
SESSION 2> select * from test_table; no rows selected SESSION 1> insert into test_table values (1); 1 row created. SESSION 1> commit; Commit complete.
Выбор Case Case: Однострочный Подзапрос Возвращает Более...
SELECT CASE WHEN (SELECT usergroup FROM usergr WHERE usergroupnumber = (SELECT usergroupnumber FROM userlist WHERE username='Carl')) LIKE '%contractor%' THEN 1 ELSE 0 END FROM DUAL. Теперь этот подзапрос возвращает более 1 строки, потому что Carl является...