merge join造句

Merge joins were added, previous all joins were nested loop joins.
Very few database products support similar type of self-merge joins.
In practice, the most expensive part of performing a sort-merge join is arranging for both inputs to the algorithm to be presented in sorted order.
Actual SQL implementations normally use other approaches, such as hash joins or sort-merge joins, since computing the Cartesian product is slower and would often require a prohibitively large amount of memory to store.
The latter condition can occur because an input to the join might be produced by an index scan of a tree-based index, another merge join, or some other plan operator that happens to produce output sorted on an appropriate key.
It's difficult to find merge join in a sentence. 用merge join造句挺难的

When querying a distributed database with free text format keywords in natural language or with phrases, ranking index sorts out the best relevant documents where query is matching textual content parts in the database, taking into account natural language density, word statistics and language-specific grammatics attributes ( incl . stemming, spelling, collation ), performing automatic self merged joins.