[Retracted] A Two-Phase Method for Optimization of the SPARQL Query

Table 1

The cardinality of intermediate results.

Different joins	The cardinality of intermediate results
T1⋈T2⋈T3⋈T4⋈T5⋈T6	2000
T1⋈T2⋈T3	1,000,000
T4⋈T5⋈T6	600,000