大约有 42,000 项符合查询结果(耗时:0.0307秒) [XML]
What is the maximum value for an int32?
...e who accidentally stored the phone number as an INT instead of VARCHAR in MySQL.
– Zarel
Feb 9 '11 at 2:00
8
...
How to convert timestamp to datetime in MySQL?
How to convert 1300464000 to 2011-03-18 16:00:00 in MySQL?
5 Answers
5
...
Get all table names of a particular database by SQL query?
...working on application which can deal with multiple database servers like "MySQL" and "MS SQL Server".
19 Answers
...
How to copy a row and insert in same table with a autoincrement field in MySQL?
In MySQL I am trying to copy a row with an autoincrement column ID=1 and insert the data into same table as a new row with column ID=2 .
...
How to see indexes for a database or table in MySQL?
...wered Mar 6 '11 at 21:05
RolandoMySQLDBARolandoMySQLDBA
40.5k1515 gold badges8181 silver badges124124 bronze badges
...
Return 0 if field is null in MySQL
In MySQL, is there a way to set the "total" fields to zero if they are NULL?
5 Answers
...
How to change MySQL column definition?
I have a mySQL table called test:
3 Answers
3
...
MySQL - UPDATE multiple rows with different values in one query
...
Excuse my english sir, when i try to make an update mysql give me the error: # 1062 - Duplicate entry 'XXX' for key 'PRIMARY'. That does when I try to update a record with the same value it already had, is there any way to skip the update if the current value is the same as be...
What are the differences between struct and class in C++?
...ate by
default. Members of a class defined
with the keywords struct or union
are public by default.
Additional difference: the keyword class can be used to declare template parameters, while the struct keyword cannot be so used.
...
Unique constraint that allows empty values in MySQL
...
Yes, you can do this. See the MySQL reference (version 5.5).
A UNIQUE index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. For all eng...
