Research Article

Block Storage Optimization and Parallel Data Processing and Analysis of Product Big Data Based on the Hadoop Platform

Table 6

The SQL descriptions of the join query.

Query typeQuery criteriaQuery statement

Full join queryNo condition settingSelect location ID, install location, acquisition time, temperature, humidity, sampling batch, sampling information
From production process, monitoring of quality parameter, monitoring environment
Where production process. Location ID = monitoring of quality parameter. Location ID = monitoring environment. Location ID
Location condition joinMonitoring location as query conditionSelect location ID, install location, acquisition time, temperature, humidity, sampling batch, sampling information
From production process, monitoring of quality parameter, monitoring environment
Where production process. Location ID = monitoring of quality parameter. Location ID = monitoring environment. Location ID and location ID between[ID1,IDn]
Time condition joinTime as query conditionSelect location ID, install location, acquisition time, temperature, humidity, sampling batch, sampling information
From production process, monitoring of quality parameter, monitoring environment
Where production process. Location ID = monitoring of quality parameter. Location ID = monitoring environment. Location ID and collection time between[T1,Tn]