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Rename a table in MySQL
Renaming a table is not working in MySQL
16 Answers
16
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How to delete a column from a table in MySQL
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Here's a working example.
Note that the COLUMN keyword is optional, as MySQL will accept just DROP IsDeleted. Also, to drop multiple columns, you have to separate them by commas and include the DROP for each one.
ALTER TABLE tbl_Country
DROP COLUMN IsDeleted,
DROP COLUMN CountryName;
This a...
Is there a way to “limit” the result with ELOQUENT ORM of Laravel?
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Not the answer you're looking for? Browse other questions tagged mysql laravel eloquent sql-limit or ask your own question.
Subtract one day from datetime
...am not certain about what precisely you are trying to do, but I think this SQL function will help you:
SELECT DATEADD(day,-1,'2013-04-01 16:25:00.250')
The above will give you 2013-03-31 16:25:00.250.
It takes you back exactly one day and works on any standard date-time or date format.
Try runn...
Deleting all rows from Cassandra cql table [duplicate]
...ommand to all the rows present in a cql table in cassandra like the one in sql?
1 Answer
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Linux编译安装软件configure参数（持续更新） - 开源 & Github - 清泛网 - ...
...续更新）configure_paramPHP configure参数，Squid configure参数，MySQL configure参数，Postfix configure参数，Courier configure参数，Sasl2 configure参数 等。PHP configure参数：
./configure --prefix=/usr/local/php --with-gd=/usr/local/gd --with-jpeg-dir=/usr/local/jpeg --wit...
oracle top 替代方案 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...from (
select * from xxx order by xx
) where rownum <= 100
等同于SQL：select top 100 * from xxx order by xx。oracle top
oracle group 取每组第一条 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...code_id =1;
这里涉及到的over()是oracle的分析函数。
参考sql reference文档：
Analytic functions compute an aggregate value based on a group of rows. They differ from aggregate functions in that they return multiple rows for each group.
Analytic functions are the last set o...
MongoDB仿关系型数据库Group聚合例子 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...x仿关系型数据库例子，通过BsonJavaScript脚本实现。相当的SQL：select * from GroupDemo a right join (select userName,max(date) maxdate from GroupDemo group by userName) b on a date=b maxdate
namespace MongoGroupDemo
{
class Program
{
private static string Mongo...
VBA读写UTF8文本文件，VBA生成UTF-8无BOM格式的文件 - 更多技术 - 清泛网 -...
...ect("ADODB.Stream")
nameto = "指定一个文件全路径 如：“D:\1.sql”"
With WriteStream
.Open
.Charset = "UTF-8"
.Type = 2 'adTypeText （文本）
.WriteText ("insert into name values('1','2','3')")
.Position = 3
End With
With BinSt
....