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- Reading Faulty CSV Files 12795
- CSV files can come in all shapes and forms, with some presenting many errors that make the process of cleanly reading them inherently difficult. To help users read these files, DuckDB supports detailed error messages, the ability to skip fa
...-Detected) null_padding=0 sample_size=20480 ignore_errors=false all_varchar=0 The first block provides us with information regarding where the error occurred, including the line number, the original CSV line and which field was problematic: Conversion Err...ckDB's CSV Rejects Table feature. By default, this feature creates two temporary tables. reject_scans : Stores information regarding the parameters of the CSV Scanner. reject_errors : Stores information regarding each CSV faulty line and in which CSV Scan... - https://man.mtool.work/duckdb/2.0/data/csv/reading_faulty_csv_files.html
- EXPORT and IMPORT DATABASE Statements 10542
- The EXPORT DATABASE command allows you to export the contents of the database to a specific directory. The IMPORT DATABASE command allows you to then read the contents again. Examples Export the database to the target directory target_direc
...IMPORT DATABASE 'source_directory'; Alternatively, use a PRAGMA : PRAGMA import_database('source_directory'); For details regarding the writing of Parquet files, see the Parquet Files page in the Data Import section and the COPY Statement page . EXPORT D... - https://man.mtool.work/duckdb/2.0/sql/statements/export.html
- Load Extensions 8760
- Overview DuckDB-Wasm's (dynamic) extension loading is modeled after regular DuckDB's extension loading, with a few relevant differences due to the difference in platform. A growing subset of core, community, and external extensions is suppo
...s) the site hosting the DuckDB-Wasm instance to access that data. The MDN website is a great resource for more information regarding CORS. If a query over a remote file fails with a network error, see Troubleshoot . Extension Signing As with regular DuckD... - https://man.mtool.work/duckdb/2.0/clients/wasm/extensions.html
- Versioning of Extensions 8306
- Extension Versioning Most software has some sort of version number. Version numbers serve a few important goals: Tie a binary to a specific state of the source code Allow determining the expected feature set Allow determining the state of t
...ibe their format: Unstable Extensions Unstable extensions are extensions that can't (or don't want to) give any guarantees regarding their current stability, or their goals of becoming stable. Unstable extensions are tagged with the short git hash of the... - https://man.mtool.work/duckdb/2.0/extensions/versioning_of_extensions.html
- Numeric Types 8306
- Fixed-Width Integer Types The types TINYINT , SMALLINT , INTEGER , BIGINT and HUGEINT store whole numbers, that is, numbers without fractional components, of various ranges. Attempts to store values outside of the allowed range will result
...ative infinity NaN : not a number On machines with the required CPU/FPU support, DuckDB follows the IEEE 754 specification regarding these special values, with one exception: NaN compares equal to NaN and greater than any other floating point number. To i... - https://man.mtool.work/duckdb/2.0/sql/data_types/numeric.html
- ODBC Extension Functions 7870
- odbc_begin_transaction odbc_bind_params odbc_close odbc_commit odbc_connect odbc_copy odbc_create_params odbc_list_data_sources odbc_list_drivers odbc_query odbc_rollback odbc_begin_transaction odbc_begin_transaction(conn_handle BIGINT) ->
...sed in INSERT and CREATE TABLE queries, cannot be specified if dest_query is specified; different DBs have different rules regarding case sensitivity and the default case, thus the name of the destination table may need to be specified in upper-case: TAB1... - https://man.mtool.work/duckdb/2.0/core_extensions/odbc/functions.html
- List Functions 6961
- Function Description list[index] Extracts a single list element using a (1-based) index . list[begin[:end][:step]] Extracts a sublist using slice conventions . Negative values are accepted. list1 && list2 Alias for list_has_any . list1 <->
...tart, stop, step) , and their variants with default arguments for stop and step . The two functions' behavior is different regarding their stop argument. This is documented below. range The range function creates a list of values in the range between star... - https://man.mtool.work/duckdb/2.0/sql/functions/list.html
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