Step 2: design the query. Test the query and improvement.From December 8 to December 29 58 58 total period of 21 days.1. questionnaire design From December 8 to December 18 58 58 included a period of 10 days.
Step 2 Questionnaire. Query Test And amended on December 8, 58 to 29 December, 58 the total period of 21 days, 1 out questionnaires on December 8, 58 to 18 December, 58 the total period of 10 days.