我是MySQL新手.我不确定我是对的.需要帮忙.
我有一个表格survey,其中包含以下列:
id, source_type, source_id, survey_date_time.
其他两个表是:
education哪个有id, col1, col2, col3列.
games哪个有id, col4, col5, col6列.
survey表格中的数据:
id source_type source_id survey_date_time
--------------------------------------------------------
100 education 1 2013-07-25 00:00:00
101 games 1 2013-07-25 00:00:00
102 games 2 2013-07-26 00:00:00
103 education 2 2013-07-26 00:00:00
education表中的数据
id col1 col2 col3
--------------------------------------------
1 col1_data1 col2_data1 col3_data1
2 col1_data2 col2_data2 col3_data2
games表中的数据
id col4 col5 col6
--------------------------------------------
1 col4_data1 col5_data1 col6_data1
2 col4_data2 col5_data2 …