Kettle组件_concat fields拼接数据 技术标签: Kettle和ETL一、转换流程 二、表输入 1.mysql新建表结构 2.表输入SQL 三、Concat fields组件 说明 (1)Target Field Name:填写我们要新建的字段名称,自己随意起 (2)Separator处:填写字段之间的拼接符号 (3)在name、type、trim处,选择我们要拼接的字段、字段类型以及去...
SELECT id, GROUP_CONCAT(field) fields FROM test2 GROUP BY id HAVING FIND_IN_SET('绿色', fields) 贴一下结果:另外贴一下黄色的结果:有用 回复 clcx_1315 5k2418 发布于 2017-06-26 只需要跟原表再关联一次即可,效率可能差点: select a.* from (select id,group_concat(field) from 表 group by...
Kettle组件_concat fields拼接数据 一、转换流程 二、表输入 1.mysql新建表结构 2.表输入SQL 三、Concat fields组件 说明 (1)Target Field Name:填写我们要新建的字段名称,自己随意起(2)Separator处:填写字段之间的拼接符号(3)在name、type、trim处,选择我们要拼接的字段、字段类型以及去空格的类型。(4)全部...
CONCAT() is a string function in standard query language (SQL) that is used to concatenate or combine two or more strings specified as arguments in the function. However, when concatenating, NULL arguments are ignored. Thus, the function helps in presenting data fields in a more readable forma...
fields terminated by ‘,’; load data local inpath ‘xxx’ into table rownumber; select id,age,name,sex, row_number() over(partition by sex order by age desc) as rownumber from rownumber; 我们可以清楚的看到 row_number() over(partition by sex order by age desc) as rownumber ...
10Microsoft SQL Server is now 32 Years old In the above examples, observe the use of CONCAT() function. There’s no data conversion being performed in the 1st test. However, in the 2nd, we are using data conversion function to convert Integer value to a string. ...
SELECTCombineFields("fruits","name",",")ASresult;--输出结果:apple,banana,orange SQL Copy 总结 在MS-Access中,尽管不存在与MySQL中group_concat函数相同的默认内置函数,但可以通过编写自定义函数的方式实现类似功能。尽管可能增加编写和维护的难度,但在附加自定义函数后,MS-Access也可以满足基本的字符串处理功能...
If you use concat in the same manner that you had used it for the previous example, which had not contained null values, the output will not display the names in fields for the Mailing_Label column as the marketing company would have expected. ...
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在SQL里面:Union uses ‘UNION’ while Concat uses ‘UNION ALL’. Union removes duplicates.Concat does not. So, they produce different results if the sources either contain any items in common, or have any internal duplicates. If you can guarantee there are no duplicates, or if there are few...