有个groupFlag 参数:1表示group by,0表示context by,2表示pivot by。默认值为1。
dt = sql(select=[sqlCol("code"), sqlColAlias(parseExpr(buy_level_1_sum),"buy_level_19_sum"), sqlColAlias(parseExpr(sell_level_1_sum),"sell_level_1_sum"), sqlColAlias(parseExpr("delta_t1(time)"),"t1"), sqlColAlias(parseExpr("delta_t2(time)"),"t2")],from=t,groupBy=sqlCol("code"),groupFlag=0).eval()