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columnar    
a. 圆柱的,圆筒形的,分纵栏印刷或书写的

圆柱的,圆筒形的,分纵栏印刷或书写的

columnar
adj 1: having the form of a column; "trees with columniform
trunks"; "columnar forms"; "a columnlike tree trunk"
[synonym: {columniform}, {columnar}, {columnlike}]
2: characterized by columns; "columnar construction"


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英文字典中文字典相关资料:


  • sql - What is a columnar database? - Stack Overflow
    How do columnar databases work? The defining concept of a column-store is that the values of a table are stored contiguously by column Thus the classic supplier table from CJ Date's supplier and parts database:
  • snowflake cloud data platform - What is hybrid-columnar storage . . .
    Columnar Storage organizes data by columns rather than rows Each column's data is stored together, allowing for efficient data compression and faster query performance for analytic workloads that typically access a subset of columns
  • Wide column vs column family vs columnar vs column oriented DB . . .
    In genuine column stores, a columnar data layout is adopted such that each column is stored separately on disk Wide-column stores do often support the notion of column families that are stored separately
  • Is Cassandra a column oriented or columnar database
    The definition from Wikipedia also helps further: Wide-column stores such as Bigtable and Apache Cassandra are not column stores in the original sense of the term, since their two-level structures do not use a columnar data layout In genuine column stores, a columnar data layout is adopted such that each column is stored separately on disk
  • How is ColumnarToRow an efficient operation in Spark
    In my understanding columnar format is better for MapReduce tasks Even for something like selection of some columns, columnar works well as we don't have to load other columns into memory But in
  • sql server - What is a columnstore index and how is different from . . .
    I am confused about the columnstore index What is a columnstore index, and how it is different from clustered and non-clustered indexes?
  • How does columnar Databases do indexing? - Stack Overflow
    But since columnar doesn't store rows together, and they are particularly designed for columnar operations, how do they differ in the indexing techniques? Do they also use B-tress? How do they index inside whatever datastructure they use? Or there is no accepted format, every vendor have their own indexing scheme to cater their needs?
  • What are the intended uses of a columnar database?
    Columnar databases can definitely access data across different columns By storing columns separately, they offer a few advantages not available in row-based storage: They only need to read the columns accessed in a particular query They make it easy to add new columns to a table They allow an individual column to be compressed, using a compression algorithm optimal for that column They
  • How to decrypt a columnar transposition cipher - Stack Overflow
    How to decrypt a columnar transposition cipher Ask Question Asked 7 years, 2 months ago Modified 7 years, 2 months ago
  • How does wide-column NoSQL differ from document-oriented?
    Correction in namings and understanding: Cassandra and Hbase are Column "Family" stores and not Column "Oriented" stores (aka columnar store) CF stores data by rows (= row oriented store) and CO stores data by column





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