31e002ad41
* init * test in frontend * copy files * use in cli * better * add desc to sdks * better * fix ts parsing * add docs to ts client * add docs to python client * use script prompt in frontend * regen * use in flow * rm * use in cli, create AGENTS.md instead of cursor rules * remove apply * better * better * simplify cli * more docs * cleaning * update readme * generate cli file * better folder names * fix ts * fix multiline
52 lines
944 B
Markdown
52 lines
944 B
Markdown
# DuckDB
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Arguments are defined with comments and used with `$name` syntax:
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```sql
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-- $name (text) = default
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-- $age (integer)
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SELECT * FROM users WHERE name = $name AND age > $age;
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```
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## Ducklake Integration
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Attach Ducklake for data lake operations:
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```sql
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-- Main ducklake
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ATTACH 'ducklake' AS dl;
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-- Named ducklake
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ATTACH 'ducklake://my_lake' AS dl;
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-- Then query
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SELECT * FROM dl.schema.table;
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```
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## External Database Connections
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Connect to external databases using resources:
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```sql
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ATTACH '$res:path/to/resource' AS db (TYPE postgres);
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SELECT * FROM db.schema.table;
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```
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## S3 File Operations
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Read files from S3 storage:
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```sql
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-- Default storage
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SELECT * FROM read_csv('s3:///path/to/file.csv');
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-- Named storage
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SELECT * FROM read_csv('s3://storage_name/path/to/file.csv');
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-- Parquet files
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SELECT * FROM read_parquet('s3:///path/to/file.parquet');
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-- JSON files
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SELECT * FROM read_json('s3:///path/to/file.json');
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```
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