要保留的数据: WITH summary AS ( SELECT p.id, p.customer, p.total, ROW_NUMBER() OVER(PARTITION BY p.customer --分组 ORDER BY p.total DESC) AS rk FROM PURCHASES p) SELECT s.* FROM summary s WHERE s.rk = 1 --1表示分组后分组结果第一行 稍微修改之后的删除: WITH summary AS ( SELECT p.i
vim技巧:如何删除/保留文本中特定的行呢? <ol><a href="/ss/ss/www"> show invisibles</a> <a href="/ss/ssg/gg/ff/"> one world one dream</a> 任务1:只保留<a>标签内的标题,而把其他行都删掉:g/re/d 知识点:使用:global与:delete命令 运行一下命令: /\v\<\ /?\w+
VBA: Sub deleteDuplicatedFeature() Dim app As IApplication Set app = Application Dim pMxDocument As IMxDocument Set pMxDocument = Application.Document Dim pMap As IMap Set pMap = pMxDocument.FocusMap Dim pFeatureLayer As IFeatureLayer ) Dim pFeatureC