Convert a CSV column into a comma-separated list for SQL IN clauses
Extract a CSV column and convert it to a comma-separated list for SQL IN clauses or code arrays.
🛡️ Your rows never leave your browser.
Why Onfyt: Produces properly SQL-escaped output—values containing single quotes are doubled ('O''Brien') so the IN clause doesn't break.
Interactive Sample Data
| id | status | |
|---|---|---|
| 1 | grace@corp.com | active |
| 2 | peter@corp.com | active |
| 3 | mercy@corp.com | inactive |
How this tool works
A common workflow in data analysis is selecting a set of values from a CSV and pasting them into a SQL WHERE IN clause, a Python set literal, or a JavaScript array. Doing this manually—copying cells from Excel, adding quotes and commas—is tedious for more than 10 values and error-prone.
DataFix extracts the selected column, deduplicates (optionally), and formats the values in your chosen output style: SQL IN ('val1', 'val2'), Python ['val1', 'val2'], JavaScript ['val1', 'val2'], or plain comma-separated.
Converting vertical column entries into single-line comma-separated lists is indispensable when preparing SQL IN clause filters, API query parameters, or bulk email distribution headers. Our formatter wraps tokens in quotation marks and strips empty elements automatically.
Converting columnar data into comma-separated lists is a routine task when preparing SQL WHERE IN clauses, REST API batch parameters, and email distribution groups. Our formatter trims whitespace around values, strips empty elements, and provides optional quote wrapping (single quotes for SQL strings, double quotes for JSON arrays) with instant one-click clipboard copying.
Converting vertical column values into delimited horizontal strings prepares clean parameters for SQL WHERE IN filters and batch API endpoints. Optional quotation wrapping ensures that text strings are formatted correctly for immediate execution. Custom delimiter controls enable formatting lists with semicolons, pipes, or spaces in addition to standard commas, matching diverse query interface requirements.
Things that usually go wrong
- Values that contain the separator are quoted — the output may need quoting stripped if used in a SQL IN clause.
- Very large columns (50,000+ rows) produce a very long string.
Edge cases we tested
🧪 Value containing a single quote (O'Brien)
Escaped as 'O''Brien' for SQL; \' for JavaScript.
🧪 Column with 10,000 values
All values included; large output warned for SQL IN clause performance.
🧪 Duplicate values in column
Deduplicated by default; toggle to keep duplicates.
Frequently Asked Questions
Can I use the output in a SQL WHERE IN clause?
Enable 'Single-quote values' mode to produce: 'Alice', 'Bob', 'Charlie' — paste directly into SQL.
Can I include only unique values?
Yes — enable 'Deduplicate before joining'.
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