Practical practice of deduplicating iOS numbers and organizing duplicate Apple user data faster

The same mobile phone number appears once in the advertising form, again in the customer service system, and there may be another entry in the history file. After merging several data sources, it seems that there are hundreds of thousands of items.iOS user numbers often lose a lot after deduplication.

What iOS number deduplication really needs to solve is not just deleting identical mobile phone numbers, but also dealing with international area codes, number formats, historical sources and merging duplicate records. The cleaner you clean up front, the easier it will be to filter Apple eco-related numbers later.

WhyiOS number database is particularly prone to duplicate data

Number duplication is usually not caused by a certain link, but accumulated over a long period of time.

The same customer may first leave a mobile phone number through an advertisement, then fill it out again on the official website, and then enter the system again when consulting customer service. Different files are saved separately and there is no problem if you look at them individually. Once they are all merged, there will be more duplicate records.

The same goes for historical customer data.

The customer list is exported once a month. If the previous data is not excluded during the next export, the same mobile phone number may appear repeatedly in different months.

so doWhen sorting iOS numbers, it is more meaningful to look at the number of independent numbers first than just looking at the total number of lines in the original file.

If you have the exact same mobile phone number, you can do the first round of duplication removal first.

The simplest type of duplication is when two numbers are exactly the same.

This kind of data can be deduplicated based on the mobile phone number itself.

But before deleting duplicate records, it is best to check whether the two pieces of data have different information.

For example, the first time the same number comes fromFacebook ads, the second time comes from the official website consultation; one record saves the product category, and the other record saves the latest update time.

In this case, it is not appropriate to leave only one number and delete the other information at the same time.

A more reasonable way is to keep a main number record and continue to merge and save valuable source and historical fields.

What is removed in this way are duplicate numbers, not customer history.

Numbers that look different may actually be the same person

Removing duplicates from international numbers is one more important step than removing duplicates from ordinary forms, which is to unify the number format first.

The same mobile phone number may be written in one way with a national area code, and in another way it may be written in a local format. Two pieces of data are inThey look completely different in Excel, but may actually correspond to the same number.

If the format is not unified first, ordinary deduplication tools can easily treat them as two independent pieces of data.

So many countriesBefore deduplicating iOS numbers, you can organize the numbers according to country and then unify the international format.

In this way, in the second round of duplicate removal, only those duplicate numbers with different writing methods can be found.

The country code is not uniform, which will directly affect the deduplication results.

The most easily overlooked aspect of overseas data is the country code.

Some files have saved the complete international number, some put the country code in a separate column, and some only have local mobile phone numbers.

If these data were merged directly, the same customer would likely not be identified as a duplicate.

Therefore, when dealing with multi-country numbers, you can first confirm which country each piece of data belongs to, and then unify it according to the corresponding international format.

Especially when multiple markets such as the United States, the United Kingdom, Japan, Thailand, and Vietnam operate at the same time, it is best to retain country information.

After the number format is unified, the accuracy of deduplication will be significantly improved.

Excel scientific notation will also invalidate duplicate numbers

Number files are often used directlyExcel handles it, but long phone numbers are easily automatically converted into scientific notation.

Once the number display or saving method changes, subsequent matching and deduplication may cause problems.

For example, if there are two identical numbers, one of which remains in text format and the other has been converted, the system may not be able to compare the original numbers normally.

Therefore, before officially removing duplicates, it is best to check whether the mobile phone number column is complete text.

This step is even more worth checking if the file has been exported, copied, and merged multiple times.

For many so-called abnormal numbers, in the end there is not a problem with the number, but the data has been changed in the table format.

When removing duplicates, do not delete the original customer sources together.

Another common problem with iOS number deduplication is to delete entire rows of duplicate records to make the file cleaner.

As a result, the number was reduced, but the source of customers was also lost.

If the same mobile phone number appears from multiple entrances at different times, these records themselves actually have business value.

For example, the first time it came from an advertisement, and then he took the initiative to enter the official website for consultation, which means that this customer has experienced more than one contact.

Therefore, after deduplication, the most important customer record can be retained, while important information such as the latest update time, source, and product classification can be retained.

The ultimate goal should be that a number corresponds to a clear master record, rather than clearing the entire history in order to reduce the number of rows.

Removing duplicates is only the first step. Follow up after sorting it out.iOS number filtering

If the original data itself already hasFor iOS user tags, removing duplicate numbers first will be more suitable for subsequent processing.

Digital Planet can continue to accept the sorted number data, and conduct Apple ecosystem-related number screening and number status sorting according to actual business needs.

The order here is important.

Solve the recurring problems with the same mobile phone number first, and then proceed to subsequent screening, which can reduce repeated detection and make it easier for subsequent results to be directly returned to the original customer data.

If you filter and remove duplicates at the same time, it is easy for the number of files before and after not to match, and you will have to merge them again later.

iOS user tags should be understood separately from phone number deduplication

Mobile phone number deduplication solves the problem of data duplication.

The iOS tag belongs to the original customer information or subsequent corresponding number screening information.

Don't mix the two.

It cannot be because both numbers are marked asFor iOS users, treat them as the same customer; you cannot delete all the business information accumulated at different times just because the same mobile phone number appears several times.

What really needs unification is the master record of mobile phone numbers.

The customer's original source, product, update time and existing device tags will continue to be retained as auxiliary information.

When merging multiple files, you can first define a master record rule

When there are many data sources, it will save time to stipulate in advance which record will be used as the master data rather than making temporary judgments.

For example, when the same number appears multiple times, the one with the latest update time can be retained first.

If the new record lacks product information but the old record does, you can continue to fill in the old fields.

If a number comes from both an advertisement and an official website, you can keep the primary source while leaving another contact record in the notes or history field.

Rules do not need to be particularly complex.

As long as there is one master record for each mobile phone number and important historical information is not lost, the data will be much clearer than the original file.

After deduplication is completed, consider which data is worth continuing to use.

one servingAfter the iOS number library is deduplicated, the number may be much smaller than the original file, but this is not a bad thing.

On the contrary, it shows that a lot of duplicate data has been cleared.

Next, you can continue to look at the country, customer source, data update time and existing tags, and then decide which numbers will enter the current marketing and which historical data will be retained temporarily.

If you need to screen laterFor WhatsApp, Telegram, LINE or other social platforms, you can also start directly from the main number library that has been deduplicated.

In this way, the same customer will not be processed multiple times when filtering on different platforms due to duplicate records.

The purpose of deduplicating iOS numbers is not to make the file smaller

really usefuliOS number deduplication is to reorganize the same customer that was originally scattered in different files into one master data.

First unify national and international number formats, and then process duplicate mobile phone numbers that are completely duplicated or have different formats, while retaining valuable customer sources, product information and historical update times.

After the sorting is completed, continue to do the necessary Apple ecological related number screening or other social platform detection through Digital Planet.

The file may end up being smaller, but the data is more complete. If only one clear entrance is reserved for a customer, subsequent screening, marketing and long-term maintenance will be much easier.

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