Results of 1 - 6 of about 6 for rowid (0.001 sec.)
- SELECT Statement 12905
- The SELECT statement retrieves rows from the database. Examples Select all columns from the table tbl : SELECT * FROM tbl; Select the rows from tbl : SELECT j FROM tbl WHERE i = 3; Perform an aggregate grouped by the column i : SELECT i, su
...to start reading the values. VALUES List A VALUES list is a set of values that is supplied instead of a SELECT statement. Row IDs For each table, the rowid pseudocolumn returns the row identifiers based on the physical storage. CREATE TABLE t (id INT...EGER, content VARCHAR); INSERT INTO t VALUES (42, 'hello'), (43, 'world'); SELECT rowid, id, content FROM t; rowid id content 0 42 hello 1 43 world In the current storage, these identifiers are contiguous unsig...ned integers (0, 1, ...) if no rows were deleted. Deletions introduce gaps in the rowids which may be reclaimed later: CREATE OR REPLACE TABLE t AS (FROM range(10) r(i)); DELETE FROM t WHERE i % 2 = 0; SELECT r... - https://man.mtool.work/duckdb/2.0/sql/statements/select.html
- JSON Processing Functions 9870
- JSON Extraction Functions There are two extraction functions, which have their respective operators. The operators can only be used if the string is stored as the JSON logical type. These functions support the same two location notations as
...ent path VARCHAR JSON path to parent element json JSON (Virtual) The json parameter root TEXT (Virtual) The path parameter rowid BIGINT (Virtual) The row identifier These functions are analogous to SQLite's functions with the same name . Note that, be...oose"], "coolness": 42.42}'), ('{"family": "canidae", "species": ["labrador", "bulldog"], "hair": true}'); SELECT je.*, je.rowid FROM example AS e, json_each(e.j) AS je; key value type atom id parent fullkey path rowid family "anatidae" VARCHAR "anati...0 species ["labrador","bulldog"] ARRAY NULL 4 NULL $.species $ 1 hair true BOOLEAN true 8 NULL $.hair $ 2 SELECT je.*, je.rowid FROM example AS e, json_each(e.j, '$.species') AS je; key value type atom id parent fullkey path rowid 0 "duck" VARCHAR "d... - https://man.mtool.work/duckdb/2.0/data/json/json_functions.html
- Order Preservation 8262
- For many operations, DuckDB preserves the order of rows, similarly to data frame libraries such as Pandas. Example Take the following table for example: CREATE TABLE tbl AS SELECT * FROM (VALUES (1, 'a'), (2, 'b'), (3, 'c')) t(x, y); SELECT
...icit column that can be referenced in the operations that don't preserve row order by default. On materialized tables, the rowid pseudo-column can be used to the same effect. The following operations do not guarantee that the row order is preserved: F... - https://man.mtool.work/duckdb/2.0/sql/dialect/order_preservation.html
- DuckLake 8097
- DuckLake 1.1 was released together with DuckDB 2.0. Read the announcement blog post . The ducklake extension adds support for attaching to databases stored in the DuckLake format . The complete documentation of this extension is available a
...e following three columns plus the schema of the table table_name . Column name Column type Description snapshot_id BIGINT rowid BIGINT change_type VARCHAR The type of change: insert or delete Commands ducklake_cleanup_old_files The ducklake_cleanup_o... - https://man.mtool.work/duckdb/2.0/core_extensions/ducklake.html
- R-Tree Indexes 7914
- The spatial extension provides support for spatial indexing through the R-tree extension index type. Why Should I Use an R-Tree Index? When working with geospatial datasets, it is very common that you want to filter rows based on their spat
...R-tree. The root node has level 0 bounds BOX_2DF The bounding box of the node row_id ROW_TYPE If this is a leaf node, the rowid of the row in the table, otherwise NULL Example: -- Create a table with 64 random points CREATE TABLE t1 AS SELECT point::... - https://man.mtool.work/duckdb/2.0/core_extensions/spatial/r-tree_indexes.html
- Window Functions 7732
- DuckDB supports window functions , which can use multiple rows to calculate a value for each row. Window functions are blocking operators , i.e., they require their entire input to be buffered, making them one of the most memory-intensive o
...erate rows: SELECT row_number() OVER () FROM sales; Tip If you only need a number for each row in a table, you can use the rowid pseudocolumn . Generate a row_number column to enumerate rows, ordered by time : SELECT row_number() OVER (ORDER BY time)... - https://man.mtool.work/duckdb/2.0/sql/functions/window_functions.html
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