大约有 6,000 项符合查询结果（耗时：0.0214秒） [XML]
MSSQL Error 'The underlying provider failed on Open'
... had no write access to the Database I'd set up. When I added the user to SQL, the Plugin worked like a charm.
– Mike_Matthews_II
Mar 8 '13 at 18:31
2
...
MySQL select 10 random rows from 600K rows fast
...ple, to gaps, to non-uniform with gaps.
http://jan.kneschke.de/projects/mysql/order-by-rand/
For most general case, here is how you do it:
SELECT name
FROM random AS r1 JOIN
(SELECT CEIL(RAND() *
(SELECT MAX(id)
FROM random)) AS id)
AS...
Return a value if no rows are found in Microsoft tSQL
Using a Microsoft version of SQL, here's my simple query. If I query a record that doesn't exist then I will get nothing returned. I'd prefer that false (0) is returned in that scenario. Looking for the simplest method to account for no records.
...
What is the PostgreSQL equivalent for ISNULL()
In MS SQL-Server, I can do:
5 Answers
5
...
When increasing the size of VARCHAR column on a large table could there be any problems?
I'm using SQL Server 2008 and I need to make a VARCHAR field bigger, from (200 to 1200) on a table with about 500k rows. What I need to know is if there are any issues I have not considered.
...
How to perform a mysqldump without a password prompt?
I would like to know the command to perform a mysqldump of a database without the prompt for the password.
13 Answers
...
Favourite performance tuning tricks [closed]
... mainly use Sybase, but most of the advice will apply across the board.
SQL Server, for example, comes with a host of performance monitoring / tuning bits, but if you don't have anything like that (and maybe even if you do) then I would consider the following...
99% of problems I have seen are c...
What is the difference between varchar and nvarchar?
...hant late answer: of course you can store UTF-8 in varchar but it'll break SQL Server string functions. If you perform all searches/transformations within your application then yes, you may do it (but what's the benefit?). Only Unicode encoding supported by SS is UCS-2 (yes, not UTF-16 before SS2k16...
What is the difference between Hibernate and Spring Data JPA
...atop of JPA makes its use tempting for:
Rookie developers who don't know SQL or know it badly. This is a
recipe for disaster but they can get away with it if the project is trivial.
Experienced engineers who know what they do and want to spindle up things
fast. This might be a viable strategy (bu...
I get a “An attempt was made to load a program with an incorrect format” error on a SQL Server repli
...on. I've recently upgraded my machine to Windows 2008 Server 64-bit. The SqlServer.Replication namespace was written for 32-bit platforms. All I needed to do to get it running again was to set the Target Platform in the Project Build Properties to X86.
...