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【问题】 PRODUCT_ID, PRODUCT_NAME 100 Nokia 200 IPhone 300 Samsung 400 LG I want to display the reco ..
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同值列统计 【问题】 表名： table 字段名： a b c&nb ..
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【问题】 I am writing a script in perl. but got stuck in one part. Below is the sample of my csv fil ..
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分组后组内成员对齐 【问题】 I am working on a jasper report in that I am using a field “RACE_CODE” which cont ..
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行列均按段分组汇总 【问题】 Please help. I have a report to do and Im hopless. I have this table setup. [图片] ..
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对比两条数据，找到差异列 【问题】 对同表中的 2 行数据全部进行对比，取出不同的数据 ID 字段 1 字段 2 字段 3 字段 4… 1& ..
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[链接]【问题】 Tid workid kind &n ..
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[链接]【问题】 现在有这么一个需求，一个表中记录了各个地点的报警开始时间，结束时间。 现在想统计，各个地点报警次数和时长，时长 = 结束时间 - 开始时间。 要求，同一个地点，开始时间间隔超 ..
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[链接] 【问题】 Suppose I have a MySQL database in 1NF with the following tables: sandwich\_id | ..
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【问题】 如何查询序列中一列中缺少的数字 A B C 1001 1002 1003 1007 1008 1009 1010 1012 如何在 A 列显示序列 ..
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【问题】 有如下查询结果 [图片] 从这里面查询每个产品 (ProductID) 具有某个（或同时具有某几个）属性 (即 AttID) 的产品数量，并按 ClassID 分组 如果只查询某个产 ..
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[链接]【问题】 I have a Source table as shown below.. Name Subject Marks ..
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【问题】 I have two tables 1)users(id,registerdate) 2)user_answer(userid,answer,updated_date) I want ..
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【问题】 [链接] [链接] I have a database where each row has an id, a URL, and an XML. The IDs are unique ..
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【问题】 [链接] [链接] I want to get best 3 day of users between “2014-07-01” and “2014-08-01” Could som ..
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【问题】 I have a csv file and I have duplicate as well as unique data getting add to it on a daily ..
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【问题】 I'm trying to compare two soccer players who played in the same team and I'm trying to know ..
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【问题】 Hello everyone, I have one query, would be great if anyone can help me out on this. I ..
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【问题】 I have a query that returns some summary records. For instance, loan amount, loan ter ..
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多层固定分组计算 【问题】 I want to build opening closing report – ITEM_TRANSACTION TABLE- Consider below da ..
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【问题】 I have a csv file that is ‘|’ delimited and has multiple lines in it. Some entries in the f ..
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【问题】 So I have one large file that contains a bunch of weather data. I have to allocate each lin ..
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【问题】 As for example i have this data in csv file which has the column names as: “people”, “commi ..
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【问题】 大家好，我又来提问了，呵呵。 我现在做一个上传的功能，要读取.txt文件里面的数据 13500000000|1 13500000001|1&nbs ..
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【问题】 I am looking for some help. I have an application at work that generates a csv with user in ..
