大约有 3,610 项符合查询结果（耗时：0.0287秒） [XML]
SQL Server: SELECT only the rows with MAX(DATE)
I have a table of data (the db is MSSQL):
11 Answers
11
...
SQL DELETE with INNER JOIN
... Here is the error i got : [Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'spawnlist FROM db.root.spawnlist s INNER JOIN db.root.npc n ON s.npc_t' at line 1 [Err] DELETE l2revo.root.spawnlist...
Select values from XML field in SQL Server 2008
...
SQL Server 2008 R2 Express, returned me this error with your solution: The XQuery syntax '/function()' is not supported.; On the other hand @Remus Rusanu seems to do it :)
– RMiranda
Apr...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
...
The fastest MySQL solution, without inner queries and without GROUP BY:
SELECT m.* -- get the row that contains the max value
FROM topten m -- "m" from "max"
LEFT JOIN topten b -- "b" from "bi...
How to select from subquery using Laravel Query Builder?
I'd like to get value by the following SQL using Eloquent ORM.
7 Answers
7
...
What is the most efficient/elegant way to parse a flat table into a tree?
...
Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL
SELECT...
PDO Prepared Inserts multiple rows in single query
I am currently using this type of SQL on MySQL to insert multiple rows of values in one single query:
22 Answers
...
varbinary to string on SQL Server
...rent things.
If the varbinary is the binary representation of a string in SQL Server (for example returned by casting to varbinary directly or from the DecryptByPassPhrase or DECOMPRESS functions) you can just CAST it
declare @b varbinary(max)
set @b = 0x5468697320697320612074657374
select cast(@...
SQL Server - When to use Clustered vs non-Clustered Index?
...k a good clustered index.
It's the most replicated data structure in your SQL Server database. The clustering key will be part of each and every non-clustered index on your table, too.
You should use extreme care when picking a clustering key - it should be:
narrow (4 bytes ideal)
unique (it's t...
postgres default timezone
I installed PostgreSQL 9 and the time it is showing is 1 hour behind the server time.
7 Answers
...