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- Logical Operators – DuckDB 13646
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...SQL uses a three-valuad logic system with true , false and NULL . Note that logical operators involving NULL do not always evaluate to NULL . For example, NULL AND false will evaluate to false , and NULL OR true will evaluate to true . Below are the comp...are commutative, that is, you can switch the left and right operand without affecting the result. 関連キーワード operators evaluate Operators logical Documentation Expressions Copy Markdown Logical following available uses three valuad logic system Note... - https://man.mtool.work/duckdb/1.3/sql/expressions/logical_operators.html
- Subqueries – DuckDB 9434
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...NY and SOME . The quantifiers ANY and SOME are equivalent. ALL The ALL quantifier specifies that the comparison as a whole evaluates to true when the individual comparison results of the expression at the left hand side of the comparison operator with ea...ch of the values from the subquery at the right hand side of the comparison operator all evaluate to true : SELECT 6 <= ALL ( SELECT grade FROM grades ) AS adequate ; returns: adequate true because 6 is less than or equa...rns excellent false because 8 is not greater than or equal to the subquery result 7. And thus, because not all comparisons evaluate true , >= ALL as a whole evaluates to false . ANY The ANY quantifier specifies that the comparison as a whole evaluates to... - https://man.mtool.work/duckdb/1.3/sql/expressions/subqueries.html
- Overview of DuckDB Internals – DuckDB 8567
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...es filters over equivalency sets. Also prunes subtrees that are guaranteed to be empty (because of filters that statically evaluate to false). Join Order Optimizer : Reorders joins using dynamic programming. Specifically, the DPccp algorithm from the pap... - https://man.mtool.work/duckdb/1.3/internals/overview.html
- Comparisons – DuckDB 8567
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...eral programming languages but are often not compatible with PostgreSQL's behavior. For example, the following expressions evaluate and return true in DuckDB but fail in PostgreSQL. SELECT 1 = true ; SELECT 1 = '1.1' ; It is not possible to enforce stric... - https://man.mtool.work/duckdb/1.3/sql/expressions/comparison_operators.html
- Reading Faulty CSV Files – DuckDB 8115
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ss and throw the error to the user. These errors are designed to provide as much information as possible to allow users to evaluate them directly in their CSV file. This is an example for a full error message: Conversion Error: CSV Error on Line: 5648 Or... - https://man.mtool.work/duckdb/1.3/data/csv/reading_faulty_csv_files.html
- Numeric Types – DuckDB 8115
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...the floating-point data types may be more appropriate. However, if you use the results for anything important, you should evaluate your implementation carefully for corner cases (ranges, infinities, underflows, invalid operations) that may be handled di... - https://man.mtool.work/duckdb/1.3/sql/data_types/numeric.html
- Node.js Client (Neo) – DuckDB 7898
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
..._MS timestampMillisValue TIMESTAMP_NS timestampNanosValue UNION unionValue UUID uuidValue Stream Results Streaming results evaluate lazily when rows are read. const result = await connection . stream ( ' from range(10_000) ' ); Inspect Result Metadata Ge... - https://man.mtool.work/duckdb/1.3/clients/node_neo/overview.html
- Integration with Ibis – DuckDB 7898
- This page is for DuckDB 1.3, which is outdated. Switch to the current version . Search Shortcut cmd + k | ctrl + k Installation Documentation Getting Started Connect Overview Concurrency Data Import Overview Data Sources CSV Files Overview
...ill_length_mm float64 bill_depth_mm float64 flipper_length_mm int64 body_mass_g int64 sex string year int64 Ibis is lazily evaluated, so instead of seeing the data, we see the schema of the table. To peek at the data, we can call head and then to_pandas...NaN None 2007 4 Adelie Torgersen 36.7 19.3 193.0 3450.0 female 2007 to_pandas takes the existing lazy table expression and evaluates it. If we leave it off, you'll see the Ibis representation of the table expression that to_pandas will evaluate (when you... - https://man.mtool.work/duckdb/1.3/guides/python/ibis.html
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