大约有 43,300 项符合查询结果（耗时：0.0550秒） [XML]
How do I ALTER a PostgreSQL table and make a column unique?
...
|
edited May 23 '17 at 12:02
Community♦
111 silver badge
answered Jan 22 '09 at 15:22
...
spring boot default H2 jdbc connection (and H2 console)
...
14 Answers
14
Active
...
Is a statically-typed full Lisp variant possible?
...
answered Jul 24 '10 at 17:51
Eli BarzilayEli Barzilay
27.8k33 gold badges5959 silver badges104104 bronze badges
...
How do I convert a PDF document to a preview image in PHP? [closed]
...
10 Answers
10
Active
...
Latex Remove Spaces Between Items in List
...
172
It's easier with the enumitem package:
\documentclass{article}
\usepackage{enumitem}
\begin{d...
In Postgresql, force unique on combination of two columns
...
CREATE TABLE someTable (
id serial primary key,
col1 int NOT NULL,
col2 int NOT NULL,
unique (col1, col2)
)
autoincrement is not postgresql. You want a serial.
If col1 and col2 make a unique and can't be null then they make a good primary key:
CREATE TABLE someTab...
How to do a regular expression replace in MySQL?
...
13 Answers
13
Active
...
How to split one string into multiple strings separated by at least one space in bash shell?
...
answered Sep 24 '09 at 5:13
mobmob
108k1717 gold badges137137 silver badges263263 bronze badges
...
How to get the changes on a branch in Git
...
187
In the context of a revision list, A...B is how git-rev-parse defines it. git-log takes a revi...