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Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AS” and “Latin1_General_CI_
...ith (as follows): DECLARE @Table TABLE (CompareMessage VARCHAR(50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL)
– FrostbiteXIII
Jun 23 '14 at 10:57
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Altering a column to be nullable
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Assuming SQL Server (based on your previous questions):
ALTER TABLE Merchant_Pending_Functions ALTER COLUMN NumberOfLocations INT NULL
Replace INT with your actual datatype.
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SQL SERVER: Get total days between two dates
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SQL Server DateDiff
DECLARE @startdate datetime2 = '2007-05-05 12:10:09.3312722';
DECLARE @enddate datetime2 = '2009-05-04 12:10:09.3312722';
SELECT DATEDIFF(day, @startdate, @enddate);
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MySql export schema without data
I'm using a MySql database with a Java program, now I want to give the program to somebody else.
13 Answers
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Plsqldev SQL含中文查无结果 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
Plsqldev SQL含中文查无结果设置环境变量：NLS_LANG值为：SIMPLIFIED CHINESE_CHINA.ZHS16GBK设置环境变量：NLS_LANG
值为：SIMPLIFIED CHINESE_CHINA.ZHS16GBKPlsqldev 中文 无结果
卸载SQL Server2000后不能再次安装的问题解决方法 - 爬虫/数据库 - 清泛IT...
曾经由于磁盘空间的问题，卸载了SQL Server2000，可当再次要把它安装上的时候，却怎么也不行了。无论是安装哪一个版本，永远都是同样的错误提示，说是有一个文件已经挂起，必须重新启动计算机。那okay啦，重新启动，再次安...
常用Sql - 爬虫/数据库 - 清泛IT社区，为创新赋能！
本帖最后由 zqp2013 于 2015-3-17 22:06 编辑
mysql：drop table if exists tablename;
不能写成
drop table tablename if exists tablename;
mysql：建立索引Sql
CREATE TABLE tablename (
`ID` &nbs...
INNER JOIN vs LEFT JOIN performance in SQL Server
I've created SQL command that uses INNER JOIN on 9 tables, anyway this command takes a very long time (more than five minutes). So my folk suggested me to change INNER JOIN to LEFT JOIN because the performance of LEFT JOIN is better, despite what I know. After I changed it, the speed of query got si...
What is the reason not to use select *?
...on. A few things off the top of my head ....
If you specify columns in a SQL statement, the SQL execution engine will error if that column is removed from the table and the query is executed.
You can more easily scan code where that column is being used.
You should always write queries to bring ba...
How do I list all tables in a schema in Oracle SQL?
How do i list all tables in a schema in Oracle SQL?
14 Answers
14
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