Want to export data from Percona table to JSON lines (JSONL / NDJSON / LDJSON)?
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JSON Lines text format (JSONL), also called Newline-delimited JSON (NDJSON), or Line-delimited JSON (LDJSON). JSON Lines files may be saved with the file extension .jsonl, *.ndjson, *.ldjson.
Export data from Percona table to JSON lines (JSONL / NDJSON / LDJSON)
Login to Percona -> Choose Percona table -> Set JSON lines file options -> Export Percona to JSON lines (JSONL / NDJSON / LDJSON)
Choose Percona and logon.
“Export From Table” for “Percona to JSON lines (JSONL / NDJSON / LDJSON)”.
Select JSON file type.
1. Choose Percona table.
2. Set JSON lines (JSONL / NDJSON / LDJSON) file options.
3. Set rows options.
4. Export Percona data to JSON lines (JSONL / NDJSON / LDJSON) table.
After exporting, you can view output JSON lines (JSONL / NDJSON / LDJSON) file.
More tools for JSONL / NDJSON / LDJSON.
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Percona → JSON Lines reference
Type mapping
| Value kind | in Percona | in JSON Lines |
|---|---|---|
| Int | INT | 1234 (number) |
| Bigint | BIGINT | 9007199254740993 |
| Decimal | DECIMAL(p,s) | 1234.56 (number) |
| Float | DOUBLE | 1.234e10 (number) |
| Text | VARCHAR(n) | "text" (string) |
| Long text | LONGTEXT | "multi-line\ntext" |
| Date | DATE | "2026-09-18" (string) |
| Datetime | DATETIME | "2026-09-18T14:30:00Z" (string) |
| Binary | LONGBLOB | "base64:..." (string) |
| Boolean | TINYINT(1) | true / false (boolean) |
| JSON | JSON | nested object on the same line |
Dialect differences
Percona is a database server and JSON Lines is a file format, so the gap is wider than a dialect difference - the rows below are where values and structure stop lining up.
| Property | in Percona | in JSON Lines |
|---|---|---|
| port | 3306 | — |
| identifiers | `backtick` | Double quotes; backslash escapes (a newline inside a string... |
| row limit | LIMIT n | — |
| dates | DATETIME, TIMESTAMP, DATE, TIME | No date type: dates arrive as strings |
| long text | TINYTEXT / TEXT / MEDIUMTEXT / LONGTEXT | — |
| binary | BLOB / TINYBLOB / LONGBLOB | Not supported natively - base64 inside a string |
| separator | — | Newline between records |
| encoding | — | UTF-8 by definition |
| typing | — | Same as JSON, but records cannot nest across lines |
| shape | Tables of rows and columns | Flat stream |
| ceiling | — | Streams, so it scales past what a single JSON document can ... |
Command line
| Side | Command |
|---|---|
| Percona | mysqldump |
| Percona (load) | mysqlimport, or LOAD DATA INFILE |
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