大约有 3,551 项符合查询结果（耗时：0.0180秒） [XML]
Use different Python version with virtualenv
...d down machine at work with no sudo privileges. Local copies of libraries, SQL databases, languages and compilers galore! Thanks!
– zachd1_618
Jan 24 '13 at 18:03
4
...
How to stop a PowerShell script on the first error?
...
Invoking eg: Exec { sqlite3.exe -bail some.db "$SQL" }, the -bail causes an error since it's trying to interpret it as a Cmdlet parameter? Wrapping things in quotes doesn't seem to work. Any ideas?
– rcoup
...
Is a GUID unique 100% of the time?
...get duplicate guids. I have two different web servers using two different sql servers. I went to merge the data and found I had 15 million guids and 7 duplicates.
share
|
improve this answer
...
ASP.NET custom error page - Server.GetLastError() is null
...ly reveal things you do not wish to do so to malicious users. For example Sql Server exception messages are very verbose and can give the user name, password and schema information of the database when an error occurs. That information should not be displayed to an end user.
...
How to change the type of a field?
...ur database, this is a big deal no matter how you do it. If you were using SQL and this was a big table you would probably have to take some down time.
– Gates VP
Jun 28 '16 at 18:16
...
Temporarily disable auto_now / auto_now_add
.../queries/… Be aware that the update() method is converted directly to an SQL statement. It is a bulk operation for direct updates. It doesn’t run any save() methods on your models, or emit the pre_save or post_save signals (which are a consequence of calling save()), or honor the auto_now field ...
Error Code: 1005. Can't create table '…' (errno: 150)
...ceeds the maximum length of 64 characters.
For more details, refer to: MySQL Error Number 1005 Can’t create table
share
|
improve this answer
|
follow
|
...
ALTER TABLE, set null in not null column, PostgreSQL 9.1
...OLUMN phone DROP NOT NULL;
More details in the manual: http://www.postgresql.org/docs/9.1/static/sql-altertable.html
share
|
improve this answer
|
follow
|
...
Difference between VARCHAR and TEXT in MySQL [duplicate]
When we create a table in MySQL with a VARCHAR column, we have to set the length for it. But for TEXT type we don't have to provide the length.
...
What is a columnar database?
...o contrast it with row oriented database.
Row oriented databases (e.g. MS SQL Server and SQLite) are designed to efficiently return data for an entire row. It does it by storing all the columns values of a row together. Row-oriented databases are well-suited for OLTP systems (e.g., retail sales...