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- List Functions – DuckDB 15684
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...ions Copy Markdown List Functions Name Description list[index] Bracket notation serves as an alias for list_extract . list[begin:end] Bracket notation with colon is an alias for list_slice . list[begin:end:step] list_slice in bracket notation with an...st. list_select(value_list, index_list) Returns a list based on the elements selected by the index_list . list_slice(list, begin, end, step) list_slice with added step feature. list_slice(list, begin, end) Extract a sublist using slice conventions. Ne...] Description Bracket notation serves as an alias for list_extract . Example [4, 5, 6][3] Result 6 Alias list_extract list[begin:end] Description Bracket notation with colon is an alias for list_slice . Example [4, 5, 6][2:3] Result [5, 6] Alias list_... - https://man.mtool.work/duckdb/1.3/sql/functions/list.html
- Timestamp Issues – DuckDB 9886
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...inning intervals to avoid overlaps at the ends. Unfortunately, the BETWEEN operator is a closed-closed interval: x BETWEEN begin AND end -- expands to begin <= x AND x <= end -- not begin <= x AND x < end To avoid this problem, make sure you are expli...imes date parts timezone timestamp temporal year table part time confusing results binning avoid using calendar month hour begin Timestamp Time Zone example range query 関連するページ Timestamp Types Timestamp with Time Zone Functions Time Types Date... - https://man.mtool.work/duckdb/1.3/guides/sql_features/timestamps.html
- Transaction Management – DuckDB 9534
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...s DuckDB provides the following statements for transaction management. Starting a Transaction To start a transaction, run: BEGIN TRANSACTION ; Committing a Transaction You can commit a transaction to make it visible to other transactions and to write...Example We illustrate the use of transactions through a simple example. CREATE TABLE person ( name VARCHAR , age BIGINT ); BEGIN TRANSACTION ; INSERT INTO person VALUES ( 'Ada' , 52 ); COMMIT ; BEGIN TRANSACTION ; DELETE FROM person WHERE name = 'Ada'... - https://man.mtool.work/duckdb/1.3/sql/statements/transactions.html
- Text Functions – DuckDB 8847
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...nd manipulating STRING values . Name Description string[index] Extracts a single character using a (1-based) index. string[begin:end] Extracts a string using slice conventions similar to Python. Missing begin or end arguments are interpreted as the be...regex Returns true if the string matches the regex (see Pattern Matching ). string ^@ search_string Returns true if string begins with search_string . arg1 || arg2 Concatenates two strings, lists, or blobs. Any NULL input results in NULL . See also co...ist2) . array_extract(string, index) Extracts a single character from a string using a (1-based) index . array_slice(list, begin, end) Extracts a sublist or substring using slice conventions . Negative values are accepted. ascii(string) Returns an int... - https://man.mtool.work/duckdb/1.3/sql/functions/text.html
- Appender – DuckDB 8495
- 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
...const char * name ); duckdb_state duckdb_appender_clear_columns ( duckdb_appender appender ); duckdb_state duckdb_appender_begin_row ( duckdb_appender appender ); duckdb_state duckdb_appender_end_row ( duckdb_appender appender ); duckdb_state duckdb_a...: The appender to clear the columns from. Return Value DuckDBSuccess on success or DuckDBError on failure. duckdb_appender_begin_row A nop function, provided for backwards compatibility reasons. Does nothing. Only duckdb_appender_end_row is required....Syntax duckdb_state duckdb_appender_begin_row ( duckdb_appender appender ); duckdb_appender_end_row Finish the current row of appends. After end_row is called, the... - https://man.mtool.work/duckdb/1.3/clients/c/appender.html
- Indexes – DuckDB 8495
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...e additional logic to (temporarily) store the result of the DELETE . All statements should be run inside a transaction via BEGIN , and eventually COMMIT . Here's an example of how that could look like in the command line client. CREATE TABLE my_table...( i INTEGER PRIMARY KEY ); INSERT INTO my_table SELECT range FROM range ( 3_000 ); BEGIN ; CREATE TEMP TABLE tmp AS SELECT i FROM my_table ; DELETE FROM my_table ; INSERT INTO my_table SELECT i FROM tmp ; DROP T... - https://man.mtool.work/duckdb/1.3/sql/indexes.html
- AutoComplete Extension – DuckDB 8043
- 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_auto_complete ( 'SEL' ); Returns: suggestion suggestion_start SELECT 0 DELETE 0 INSERT 0 CALL 0 LOAD 0 CALL 0 ALTER 0 BEGIN 0 EXPORT 0 CREATE 0 PREPARE 0 EXECUTE 0 EXPLAIN 0 ROLLBACK 0 DESCRIBE 0 SUMMARIZE 0 CHECKPOINT 0 DEALLOCATE 0 UPDATE 0 DRO... - https://man.mtool.work/duckdb/1.3/core_extensions/autocomplete.html
- Appender – DuckDB 7925
- 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
...in one function call, as follows: appender . AppendRow ( 1 , "Mark" ); Rows can also be individually constructed using the BeginRow , EndRow and Append methods. This is done internally by AppendRow , and hence has the same performance characteristics....appender . BeginRow (); appender . Append < int32_t > ( 2 ); appender . Append < string > ( "Hannes" ); appender . EndRow (); Any values ad...very 204,800 rows. You can change this by explicitly using transactions and surrounding your batches of AppendRow calls by BEGIN TRANSACTION and COMMIT statements. Handling Constraint Violations If the Appender encounters a PRIMARY KEY conflict or a U... - https://man.mtool.work/duckdb/1.3/data/appender.html
- INSERT Statements – DuckDB 7925
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...tly slow down your program. Tip If you absolutely must use INSERT statements in a loop to load data, wrap them in calls to BEGIN TRANSACTION and COMMIT . Syntax An example of using INSERT INTO to load data in a table is as follows: CREATE TABLE people... - https://man.mtool.work/duckdb/1.3/data/insert.html
- Multiple Connections – DuckDB 7925
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...l be executed in the same connection. A test that would verify the above property would look as follows: statement ok con1 BEGIN TRANSACTION statement ok con1 CREATE TABLE integers ( i INTEGER ); statement error con2 SELECT * FROM integers ; Concurren... - https://man.mtool.work/duckdb/1.3/dev/sqllogictest/multiple_connections.html
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