大约有 6,000 项符合查询结果（耗时：0.0301秒） [XML]
Entity Attribute Value Database vs. strict Relational Model Ecommerce
...complex code required to validate simple data types
Con: much more complex SQL for simple
reports
Con: complex reports can become almost
impossible
Con: poor performance for large data sets
Option 2, Modelling each entity separately:
Con: more time required to gather
requirements and design
Con:...
How to use Oracle ORDER BY and ROWNUM correctly?
I am having a hard time converting stored procedures from SQL Server to Oracle to have our product compatible with it.
4 An...
Pythonic way to create a long multi-line string
...essee example code show how NOT to do it correctly (they're invitations to SQL attacks). See also: dev.mysql.com/doc/connector-python/en/…
– Scott Prive
Oct 8 '16 at 17:29
...
How do you truncate all tables in a database using TSQL?
...
For SQL 2005,
EXEC sp_MSForEachTable 'TRUNCATE TABLE ?'
Couple more links for 2000 and 2005/2008..
share
|
improve this ...
What is the difference between varchar and varchar2 in Oracle?
...r VARCHAR2. It is NOT a SYNONYM which is an actual object type in Oracle.
SQL> select substr(banner,1,80) from v$version where rownum=1;
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
SQL> create table test (my_char varchar(20));
Table created.
SQL> desc...
Under what circumstances is an SqlConnection automatically enlisted in an ambient TransactionScope T
What does it mean for an SqlConnection to be "enlisted" in a transaction? Does it simply mean that commands I execute on the connection will participate in the transaction?
...
Use cases for NoSQL [closed]
NoSQL has been getting a lot of attention in our industry recently. I'm really interested in what peoples thoughts are on the best use-cases for its use over relational database storage. What should trigger a developer into thinking that particular datasets are more suited to a NoSQL solution. I'm p...
Check if a row exists, otherwise insert
I need to write a T-SQL stored procedure that updates a row in a table. If the row doesn't exist, insert it. All this steps wrapped by a transaction.
...
MySQL: Selecting multiple fields into multiple variables in a stored procedure
...multiple columns into multiple variables within the same select query in MySQL?
3 Answers
...
The permissions granted to user ' are insufficient for performing this operation. (rsAccessDenied)"}
...n resolve this issue by
Add the [Domain\User] to Administrator, IISUser, SQLReportingUser groups
Delete Encryption Key in SSRS configuration tools
ReRun the Database Change in SSRS configuration tools
Open WebServiceUrl from SSRS configuration tools (http://localhost/reportserver)
creating Reports...