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- Lakehouse Formats 12168
- Lakehouse formats, often referred to as open table formats, are specifications for storing data in object storage while maintaining some guarantees such as ACID transactions or keeping snapshot history. Over time, multiple lakehouse formats
... - https://man.mtool.work/duckdb/2.0/lakehouse_formats.html
- Execution Format 9412
- Vector is the container format used to store in-memory data during execution. DataChunk is a collection of Vectors, used for instance to represent a column list in a PhysicalProjection operator. Data Flow DuckDB uses a vectorized query exec
...ution model. All operators in DuckDB are optimized to work on Vectors of a fixed size. This fixed size is commonly referred to in the code as STANDARD_VECTOR_SIZE . The default STANDARD_VECTOR_SIZE is 2048 tuples. Vector Format Vectors logically... - https://man.mtool.work/duckdb/2.0/internals/vector.html
- CREATE TABLE Statement 8025
- The CREATE TABLE statement creates a table in the catalog. Examples Create a table with two integer columns ( i and j ): CREATE TABLE t1 (i INTEGER, j INTEGER); Create a table with a primary key: CREATE TABLE t1 (id INTEGER PRIMARY KEY, j V
...olumn (or set of columns) that references another table's primary key. Foreign keys check referential integrity, i.e., the referred primary key must exist in the other table upon insertion. CREATE TABLE t1 (id INTEGER PRIMARY KEY, j VARCHAR); CREATE TABL... - https://man.mtool.work/duckdb/2.0/sql/statements/create_table.html
- FROM and JOIN Clauses 7341
- The FROM clause specifies the source of the data on which the remainder of the query should operate. Logically, the FROM clause is where the query starts execution. The FROM clause can contain a single table, a combination of multiple table
...Joins Joins are a fundamental relational operation used to connect two tables or relations horizontally. The relations are referred to as the left and right sides of the join based on how they are written in the join clause. Each result row has the colum... - https://man.mtool.work/duckdb/2.0/sql/query_syntax/from.html
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