大约有 3,620 项符合查询结果（耗时：0.0147秒） [XML]
How to have an automatic timestamp in SQLite?
I have an SQLite database, version 3 and I am using C# to create an application that uses this database.
7 Answers
...
Fastest way to get the first object from a queryset in django?
...etting a LIMIT if you're gonna call get() in the end ? Let the ORM and the SQL compiler decide what's best for it's backend (for example, on Oracle Django emulates LIMIT, so it will hurt instead of helping).
– lqc
Jul 3 '12 at 7:55
...
MySQL “NOT IN” query
...
NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL in MySQL
MySQL, as well as all other systems except SQL Server, is able to optimize LEFT JOIN / IS NULL to return FALSE as soon the matching value is found, and it is the only system that cared to document this behavior.
[...
Access denied for user 'test'@'localhost' (using password: YES) except root user
I am facing problem with mysql non root/admin user, I am following the below steps for creating user and its privileges, correct me if i am doing wrong,
...
How to show all privileges from a user in oracle?
...lease tell me how to show all privileges/rules from a specific user in the sql-console?
6 Answers
...
Generate a random number in the range 1 - 10
...
If you are using SQL Server then correct way to get integer is
SELECT Cast(RAND()*(b-a)+a as int);
Where
'b' is the upper limit
'a' is lower limit
share
...
Reorder / reset auto increment primary key
I have a MySQL table with an auto increment primary key. I deleted some rows in the middle of the table. Now I have, for example, something like this in the ID column: 12, 13, 14, 19, 20. I deleted the 15, 16, 17 and 18 rows.
...
Easiest way to copy a table from one database to another?
...
If you have shell access you may use mysqldump to dump the content of database1.table1 and pipe it to mysql to database2. The problem here is that table1 is still table1.
mysqldump --user=user1 --password=password1 database1 table1 \
| mysql --user=user2 --passwo...
What does it mean by select 1 from table?
...n the EXISTS is ignored and you can write this as per Page 191 of the ANSI SQL 1992 Standard:
SELECT * FROM AnotherTable
WHERE EXISTS (SELECT 1/0 FROM table WHERE...)
share
|
improve this answe...
Checking for a null int value from a Java ResultSet
...worth a separate thread on SO imho. (java.sun.com/j2se/1.4.2/docs/api/java/sql/…)
– Roman
May 27 '10 at 10:58
...