大约有 6,000 项符合查询结果（耗时：0.0385秒） [XML]
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...
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...
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?
...
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...
Postgres: clear entire database before re-creating / re-populating from bash script
...t actually need a backup of the database dumped onto disk in a plain-text .sql script file format, you could connect pg_dump and pg_restore directly together over a pipe.
To drop and recreate tables, you could use the --clean command-line option for pg_dump to emit SQL commands to clean (drop) data...
Postgresql not creating db with “createdb” as superuser, yet not outputting errors [duplicate]
I am working with a fresh postgresql install, with 'postgres' super user. Logged in via:
5 Answers
...
Good Free Alternative To MS Access [closed]
...uestion, we're concerned with the raw database engine. With that in mind:
SQLlite,
Firebird,
VistaDB (not free),
SQL Server Compact Edition (not Express)
and now SQL Server LocalDB
all come to mind.
Another thought: while the original question does ask about desktop databases, its likely some peop...
Entity Framework select distinct name
How can I do this SQL query with Entity Framework ?
8 Answers
8
...