行转列一般通过CASE WHEN 语句来实现，也可以通过 SQL SERVER 2005 新增的运算符PIVOT来实现。用传统的方法，比较好理解。层次清晰，而且比较习惯。 但是PIVOT 、UNPIVOT提供的语法比一系列复杂的SELECT...CASE 语句中所指定的语法更简单、更具可读性。下面我们通过几个简单的例子来介绍一下列转行、行转列问题。
Is it possible??? Any help will be appreciated. Edited 1 time(s). Last edit at 08/17/2009 05:42AM by kumaraswamy nandipati. Subject Views Written By Posted How to convert columns as rows??? 3387 kumaraswamy nandipati August 17, ...
Trick: massage a Group_Concat() result on the csv string into an Insert...Values... string: droptableifexistst;createtablet( txt text );insertintotvalues('1,2,3,4,5,6,7,8,9');droptemporarytableifexiststemp;createtemporarytabletemp( valchar(255) );set@sql=concat("insert into temp ...
I have tried a lot of queries and saw a lot of videos and tutorials. I am little bit confused about it that " How and what type rows we can convert into columns? "
语法:alter table 表名 convert to character set 字符集; 修改字段的字符集 语法:alter table 表名 modify 字段名 字段属性 character set gbk; 三、设置MySQL默认字符集 在命令行上修改字符集后,MySQL重启后,设置会消失,恢复成MySQL配置文件中的字符集设置。
The number of length bytes required by a VARCHAR column must remain the same. For VARCHAR columns of 0 to 255 bytes in size, one length byte is required to encode the value. For VARCHAR columns of 256 bytes in size or more, two length bytes are required. As a result, in-place ALTER...
Let the rows and columns of the grid be numbered from1 to N, inclusive. There are two #include sed .net 二维 #pragma 转载 mob604756fb3b48 2019-04-21 09:51:00 75阅读 2评论 incorrect string value: for column at row alter table TABLE_NAME convert to character set utf8mb4 ...
mysql> SHOW FULL COLUMNS FROM tbl_name; -- 查看字段编码: 1. 2. 3. 4. 5. mysql> alter table table_name convert to character set utf8mb4 -- 修改表的字符集 1. collation:指字符串的排序规则,ci(case insensitive)结尾的排序集是大小写不敏感的,默认是不区分大小写的 ...
mysql> set global innodb_fast_shutdown=0;Query OK, 0 rows affected (0.00 sec)mysql> shutdown;Query OK, 0 rows affected (0.00 sec)mysql> exitBye[root@cmdb ~]# ps -ef | grep mysqlroot 30990 30934 0 16:12 pts/0 00:00:00 grep --color=auto mysql4、备份Mysql 数据目录,安装目录 ...
Re: TO CONVERT ROWS RETURN BY QUERY INTO COLUMNS 4480 Jason Belec March 03, 2007 01:03PM To convert rows into columns 2515 NITESH SINHA February 13, 2007 01:29AM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respecti...