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I’m sitting on a backlog of well over 10,000 customer records—contact information, purchase history, and demographic details—that must be brought into a MySQL 8 database while being cleaned up along the way. The raw files contain plenty of duplicate rows, mixed-format fields, and out-of-date entries, so the job calls for more than a simple import script. Here’s what I need done: • Import or migrate the source files (CSV/Excel) into MySQL without data loss • Remove all duplicate records at both row and field level • Update or flag outdated phone numbers, emails, and addresses using the reference lists I provide • Standardize naming conventions, date formats, phone masks, currency values, and any other inconsistent fields so the final dataset is uniform and query-ready • Supply change logs or before/after reports so I can audit your work Acceptance criteria: the final MySQL tables load without errors, pass my spot-check queries for accuracy, and reflect a 100 % removal of obvious duplicates and mis-formatted values. If you are comfortable writing SQL scripts or using tools like MySQL Workbench, phpMyAdmin, or Python/Pandas for batching, let’s get this cleaned up and running.
Project ID: 40726414
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20 freelancers are bidding on average ₹548 INR/hour for this job

Hello, I can help you with "Bulk MySQL Data Cleansing" as per your given project description. We can discuss more in detail during a chat conversation when you are available. I've worked on many PHP projects in recent times. So I am confident on achieving your expected Goals. Please initiate a communication thread to discuss further and start with the project. ⭐ 5.0/5 from a recent client: "A more professional version: “Excellent work! The job was completed within the committed timeline. Great quality, professionalism, and timely delivery. Highly appreciated and recommended.”" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
₹450 INR in 1 day
7.7
7.7

Greetings of the day!... I have 25+ years of sound experience in website development and designing area and have expertise working with technologies like PHP, .NET, Angular, Flutter, HTML5, CSS3, NodeJS, Python, Aws, Azure and Firebase and very much proficient using relational databases like MySQL, PostgreSQL, MS SQL, Oracle and NoSQL databases like DynamoDB, Cosmos DB and MongoDB. I'll provide you updated MySQL database after importing all your CSV/Excel files into database tables without any data loss, after removing obvious duplicate records, updating all outdated phone numbers, emails and addresses using your provided reference list. standardizing naming conventions, date formats, phone masks, currency values, and any other inconsistent fields and will provide a complete audit report describing what has been changed. It's relatively simple and easy job for me. I'm happy to say my clients love my work and generally hire me repetitively for their on-going project requirements. I always provide quality work, deliver my work on time and as per requirements that results in the highest level of my customer's satisfaction. In addition to the payment I like to have your excellent five star positive feedback. : -) Please provide your backlog of customer records, contact information, purchase history, and demographic details to start the work as early as possible. Looking to have your positive reply. Let's start right now... Thank you.
₹600 INR in 30 days
7.8
7.8

Migrating and sanitizing 10,000+ customer records into MySQL 8 requires a staged ETL pipeline, deterministic deduplication logic, and rigorous audit tracking to guarantee zero data loss. I will clean, standardize, and load your records into an optimized, query-ready relational schema. my approach: I will build an automated migration pipeline using Python (Pandas/SQLAlchemy) and MySQL Workbench. First, raw CSV/Excel files will be staged into raw import tables. I will implement programmatic cleansing: fuzzy and exact deduplication (deduping across emails, phone hashes, and composite keys), cross-referencing against your suppression/update lists, and standardizing dates (ISO 8601), phone masks (E.164), casing, and currency fields. Cleaned records will load into normalized MySQL 8 tables with proper indexes and constraints. Deliverables include the SQL migration scripts, schema DDL, and an itemized before/after audit report with change logs. A few questions to align: 1. What unique identifier or composite rule (e.g., email + last name) should govern duplicate resolution if purchase histories diverge? 2. Do you have an existing MySQL 8 schema ready, or should I design the table structures for you? I am ready to clean and migrate your records accurately.
₹400 INR in 40 days
5.8
5.8

I am database adminstrator and use phpMyAdmin to clean and running this Bulk Mysql data smoothly as per your requirements. Please give me this opportunity to work on. Thank You
₹400 INR in 40 days
4.5
4.5

Highly skilled and experienced SQL expert with over 20 years of hands-on experience in designing and optimizing complex databases. Proven track record of delivering efficient and scalable database solutions. Proficient in various database management systems, including Oracle, MySQL, and SQL Server. Strong analytical and problem-solving abilities with a deep understanding of SQL query optimization and performance tuning.
₹575 INR in 40 days
4.7
4.7

Hello Hope you are doing well "Clean And Standardize MySQL Customer Data" - I can clean 10,000+ records using MySQL 8, SQL scripts, Python/Pandas, and reliable validation workflows. I can migrate CSV and Excel data safely, remove duplicate rows and fields, standardize formats, validate outdated contact details, and preserve complete auditability throughout. I will create before-and-after reports, change logs, validation queries, and optimized MySQL tables while thoroughly checking imports for accuracy and formatting consistency. Would you prefer the cleansing workflow to use pure SQL or Python/Pandas for batch processing? Looking forward to working with you.
₹1,000 INR in 40 days
3.1
3.1

Let’s turn your 10,000+ customer records into a clean, consistent MySQL 8 dataset without losing the original information. I can handle the complete migration from CSV/Excel into MySQL, including duplicate detection and removal, field-level cleanup, standardization, and validation. I can use SQL, MySQL Workbench, phpMyAdmin, or Python/Pandas depending on the source structure and volume. I’ll standardize names, dates, phone numbers, addresses, currency values, and other inconsistent fields according to your requirements. For outdated contact information, I’ll use the reference lists you provide to update or appropriately flag records rather than making assumptions. I’ll also create before/after reports or change logs so you can audit exactly what was modified, merged, flagged, or removed. Before final delivery, I’ll run validation queries and checks for duplicates, formatting consistency, missing values, and import errors. I’m comfortable working with large datasets and can structure the process in batches with backups and validation checkpoints to minimise risk. Ready to review the source files and reference lists and start immediately.
₹400 INR in 20 days
2.8
2.8

Hello, I can help clean, standardize, deduplicate, and migrate your 10,000+ customer records into MySQL 8 accurately and safely. 1. 6+ years of full-stack development experience with MySQL, PHP, Python and database-driven applications. 2. I can import CSV/Excel data into staging tables first, validate the records, then migrate the cleaned data into the final MySQL structure without unnecessary data loss. 3. I can handle duplicate detection at both row and field level using SQL/Python, including configurable matching rules for customer records. 4. I can standardize names, dates, phone numbers, email formats, addresses, currencies and other inconsistent fields. 5. Supplied reference lists can be used to update or flag outdated contact information. 6. I can maintain detailed before/after reports and change logs so every transformation is auditable. 7. I’ll also provide validation queries to verify duplicates, formatting issues, missing values and overall data integrity. I can use MySQL Workbench, SQL scripts and Python/Pandas depending on the source data and cleansing requirements. I’m ready to start by reviewing a sample of the source files and defining the cleansing rules. Thank you.
₹750 INR in 40 days
3.4
3.4

Hi, I’m an experienced Full Stack Developer with 8+ years of experience working with MySQL, SQL, PHP/Laravel and data-driven applications. I can clean and migrate your 10,000+ customer records into MySQL 8 while preserving the original data and maintaining a clear audit trail. I can handle: • CSV/Excel → MySQL 8 migration • Duplicate detection and removal at row/field level • Standardization of names, dates, phone numbers and currency values • Email, phone and address validation against your reference lists • Flagging or updating outdated records • SQL-based cleansing and transformation • Safe batch processing for large datasets • Before/after reports and change logs • Validation queries and final spot-checking I’ll first create a backup/staging dataset and perform the cleansing there before applying the validated changes to the final tables. This helps prevent accidental data loss and makes the process auditable. I’m comfortable using MySQL Workbench, phpMyAdmin, SQL scripts and Python/Pandas where appropriate. I can start immediately. Rate: ₹600/hour Estimated timeline: 2–4 days Regards, TechAvinya
₹575 INR in 40 days
2.3
2.3

Hi, I see you're dealing with a huge backlog of customer records that need to be cleaned up and imported into a MySQL database, which is a challenging task due to the presence of duplicate rows, mixed-format fields, and out-of-date entries. I'd approach this by setting up a data processing pipeline that uses Python and Pandas to handle the CSV and Excel files, and then utilizes MySQL Workbench to import the cleaned data into the database. I'll make sure to standardize the naming conventions, date formats, and other inconsistent fields to ensure the final dataset is uniform and query-ready. In my experience, one common mistake when doing bulk data cleansing is not properly handling the duplicate records, which can lead to data loss or inconsistencies. To avoid this, I'll use a combination of SQL scripts and Python code to remove duplicates at both row and field level, and then update or flag outdated information using the provided reference lists. As a result, you can expect a clean and consistent dataset that loads without errors, passes spot-check queries for accuracy, and reflects a 100% removal of obvious duplicates and mis-formatted values.
₹500 INR in 40 days
0.7
0.7

Hi, I can clean and migrate the 10,000+ customer records into MySQL 8 using Python/pandas and SQL while keeping the process auditable and protecting the original source data. My approach would be to load the CSV/Excel files into a staging layer, standardize dates, phone numbers, currency values and naming conventions, identify duplicates, apply the reference-list corrections you provide, validate the cleaned dataset, and then load the final records into MySQL. I can also provide a before/after or change-log report showing removed duplicates, corrected values, flagged records, and import totals so the migration can be audited easily. My rate is ₹450/hour, and I can start right away. Before beginning, could you confirm: 1. What do you mean by duplicates at the “field level”—for example, should two records sharing the same phone/email be merged, flagged, or left separate? 2. Are the outdated contact details fully covered by the reference lists you’ll provide? 3. Do all source files use roughly the same columns/schema? 4. Will you provide MySQL credentials/database access, or should I prepare the cleaned database locally and provide an import script/dump?
₹450 INR in 12 days
0.3
0.3

Hi, I can clean and migrate your 10,000+ customer records into MySQL 8 using a reproducible Python/Pandas + SQL workflow. My approach will be: • preserve the raw source data before any changes • import CSV/Excel files without data loss • identify exact and near-duplicate records • standardize names, dates, phone numbers, currencies and other inconsistent fields • update or flag outdated emails, phones and addresses using your reference lists only • load the cleaned dataset into MySQL 8 • run validation queries for duplicates, malformed values and import errors • provide a before/after report and change log for auditing I will first test the process on a small sample so the matching and cleanup rules can be confirmed before applying them to the full dataset. I’m available to start immediately. Rate: ₹450/hour
₹450 INR in 10 days
0.0
0.0

I can import the CSV and Excel files into MySQL 8 with a traceable cleaning process. I will profile duplicate keys and inconsistent fields, normalize agreed formats, compare record counts before and after import, and provide change logs plus a list of entries that need human review.
₹400 INR in 10 days
0.0
0.0

Hi, I work with MySQL daily and have cleaned and merged large customer and product datasets for ecommerce sites. 10,000+ records is a comfortable size. Method: 1. Load the raw CSV/Excel into staging tables exactly as they are (utf8mb4, no data loss), and keep the originals untouched. 2. Profile each column: formats, blanks and obvious junk, shared with you as a short report. 3. Standardise with SQL + a PHP/Python script: names (case, spacing), dates to ISO, phones to one mask (E.164), emails lowercased and validated, currency to DECIMAL. 4. Deduplicate: exact matches first, then fuzzy matches on name + phone/email. Merge rules agreed with you, so no data is lost silently. 5. Update or flag outdated phones, emails and addresses against your reference lists. 6. Load into clean final MySQL 8 tables with keys and indexes. 7. Audit: change log per record (before/after) and a summary with counts of duplicates removed and fields fixed. Rate: INR 400/hour, about 15-20 hours. Question: roughly how many source files are there, and are the reference lists in Excel too? Zakwan - TechBoiL, IT since 1998
₹400 INR in 7 days
0.0
0.0

Chennai, India
Member since Aug 30, 2026
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₹12500-37500 INR