sql connect sleep 3000 sql show databases sql drop database $data00 -x e1 e1: sql show databases sql drop database $data00 -x e2 e2: $i = 0 $dbPrefix = lm_dt_db $tbPrefix = lm_dt_tb $db = $dbPrefix $tb = $tbPrefix print =============== step1 sql create database $db $table = lm_dt_db.lm_dt_tb print =============== step2 sql create table $table (ts timestamp, speed int) print =============== step3 sql insert into $table values (now, 1) print =============== step4 sql select * from $table if $rows != 1 then return -1 endi if $data01 != 1 then return -1 endi print =============== step5 sql describe $table print =============== step6 sql drop table $table sql drop database $db sql show databases if $rows != 0 then return -1 endi