records | 易学教程

Select records based on the specific index string value and then remove subsequent fields by python

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问题 I have a .csv file named file01.csv that contains many records. Some records are required and some are not. I find that the required records has a string variable “Mi”, but it is not exist into the unnecessary records. So, I want to select the required records based on string value “Mi” in the field for every records. Finally I want to delete the subsequent fields of each record from the field that contains value “Mi”. Any suggestion and advice is appreciated. Optional: In addition, I want to

Creating an Interactive Multi Field Search Bar in MS-ACCESS

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问题 I know this is probably a simple thing I'm missing, but I'm hoping you all can help. I'm trying to add a textbox to my form that allows users to type in search criteria and have the query filter the records to only display those that qualify. The trick is I want the user to be able to type in info and have it check all the fields of the form and return records for any that are valid. I set up a query with the fields that I want checked and I watched a few tutorials on setting criteria, but

Multiple record insert - Classsic ASP

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问题 I need to fetch data from one table (multiple rows) and insert into other table after modifying and adding some new fields. For example: Table 1 itemid, price, qnt, date_of_dispatch ,etc Table2 Invoiceid, Invoicedate, customer_id, itemid, price, qnt, total_amt, date_of_dispatch, grandtotal Please help me to make it in Classic asp with ms access in first stage I will fetch record in page from table one (multiple rows) so user can modify , then after click save button insert all data in present

Adding data to XML file

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问题 My XML file is: <?xml version="1.0" encoding="utf-8" ?> <people> <person index="1" name="Zlecenie numer jeden" beneficiary="Kowalski" description="Proste zlecenie jakiejs strony czy cos" price="800" deadline="27.12.2013" /> </people> How can I add to this existing file, something like new record: <person index="4" name="Zlecenie numer cztery" beneficiary="Kowalski" description="Proste zlecenie jakiejs strony czy cos" price="800" deadline="27.12.2013" /> or remove or if you know how to update

ListView changes records while scrolling

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问题 This is how I see my screen the when the page loads. But when I start scrolling through the list, all my records start to change and it becomes really weird. I really don't know why, any suggestions? This is the screen after I scroll through my ListView up and down. Adapter: private class TechnicalDocumentationAdapter extends ArrayAdapter<TechnicalDocumentation> { private ArrayList<TechnicalDocumentation> items; public TechnicalDocumentationAdapter(Context context, int textViewResourceId,

sql left join returns

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问题 I am trying to run a left join on 2 tables. I do not have a group by and the only where condition i have is on the second table. But, the returned rows are less than the first table. isn't the left join suppose to bring all the data from the first table? Here is my SQL: select * from tbl_a A left join tbl_b B ON A.Cnumber=B.Cnumber and A.CDNUmber=B.CDNumber and abs(A.duration - B.Duration)<2 and substr(A.text,1,3)||substr(A.text,5,8)||substr(A.text,9,2)=substr(B.text,1,8) where B.fixed =

Count records from two tables grouped by one field

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问题 I have 2 tables: doctorreports with fields: DoctorRepID RepName DoctorName DateAdded hospitals with fields: HospitalID RepName HospitalName DoctorName DateAdded I need to count the records added by each RepName in doctorreports & hospitals with the DateAdded. I need it to appear like this: RepName | DoctorReportsCount | HospitalsReportsCount | DateAdded | | | John | 15 | 12 | 9/4/2012 RepName in doctorsreports table equal RepName in hospitals table. @bluefeet This is partially what I need,

Locking tables in Access 2010

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问题 How do I lock fields in access so the user is only able to add to table? I want the user to only have access to adding to the table to maintain data integrity. 回答1: Since you are using Access 2010 (or later) you can use event-driven Data Macros to restrict what the users can do. To prevent them from deleting records you can use the following Before Delete macro: If you also want to prevent them from editing existing records you can use the following Before Change macro: For more information

Delphi: Declaring constant record type containing constant arrays

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问题 I have many constant arrays that do not all have the same number of elements. To store these arrays, I have declared an array type large enough to store (or reference?) every element of the largest of these arrays: type TElements = array [1 .. 1024] of Single; Each of these TElements arrays are logically associated with one other TElements array that does have the same number of elements. So to pair up these equally-sized arrays, I have declared a record type as: type TPair = record n :

初始 Kafka Consumer 消费者

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> >温馨提示：整个 Kafka 专栏基于 kafka-2.2.1 版本。 1、KafkaConsumer 概述根据 KafkaConsumer 类上的注释上来看 KafkaConsumer 具有如下特征：在 Kafka 中 KafkaConsumer 是线程不安全的。 2.2.1 版本的KafkaConsumer 兼容 kafka 0.10.0 和 0.11.0 等低版本。消息偏移量与消费偏移量(消息消费进度) Kafka 为分区中的每一条消息维护一个偏移量，即消息偏移量。这个偏移量充当该分区内记录的唯一标识符。消费偏移量(消息消费进度)存储的是消费组当前的处理进度。消息消费进度的提交在 kafka 中可以定时自动提交也可以手动提交。手动提交可以调用 ommitSync() 或 commitAsync 方法。消费组与订阅关系多个消费这可以同属于一个消费组，消费组内的所有消费者共同消费主题下的所有消息。一个消费组可以订阅多个主题。队列负载机制既然同一个消费组内的消费者共同承担主题下所有队列的消费，那他们如何进行分工呢？默认情况下采取平均分配，例如一个消费组有两个消费者c1、c2，一个 topic 的分区数为6，那 c1 会负责3个分区的消费，同样 c2 会负责另外3个分区的分配。