sql data query

1. Data query

# select * query all fields from xad_app_log from this table where 1=1 condition is always true and event_type="xad_impression" is condition 
sql = ' select * from xad_app_log where 1=1 and event_type="xad_impression" and package_name="com. ss.android.article.lite" and ngx_date="%s" ' % ' 20180508 '