求每个终点的平均票价的SQL语句是A）SELECT终点，avg（票价）FROM ticket GROUP BY票价B）SELECT终点，avg（票价）FROM ticket ORDER BY票价C）SELECT终点，avg（票价）FROM ticket ORDER BY终点D）SELECT终点，avg（票价）FROM ticket GROUP BY终点

[单选题]求每个终点的平均票价的SQL语句是：A）SELECT终点，avg（票价）FROM ticket GROUP BY票价B）SELECT终点，avg（票价）FROM ticket ORDER BY票价C）SELECT终点，avg（票价）FROM ticket ORDER BY终点D）SELECT终点，avg（票价）FROM ticket GROUP BY终点

[单选题]求每个终点的平均票价的SQL语句是A．SELECT终点，avg (票价) FROM ticket GROUP BY 票价B．SELECT终点，avg (票价) FROM ticket ORDER BY 票价C．SELECT终点，avg (票价) FROM ticket ORDER BY 终点D．SELECT终点，avg (票价) FROM ticket GROUP BY 终点

[单选题]求每个终点的平均票价的SQL语句是：A．SELECT终点，avg (票价) FROM ticket GROUP BY 票价B．SELECT终点，avg (票价) FROM ticket ORDER BY 票价C．SELECT终点，avg (票价) FROM ticket ORDER BY 终点D．SELECT终点，avg (票价) FROM ticket GROUP BY 终点

[单选题]求每个终点的平均票价的SQL语句是A．SELECT终点，avg(票价)FROM ticket GROUP BY票价B．SELECT终点，avg(票价)FROM ticket ORDER BY票价C．SELECT终点，avg(票价)FROM ticket ORDER BY终点D．SELECT终点，avg(票价)FROM ticket GROUP BY终点

[单选题]有如下SQL语句： SELECT账号，avg(账户金额)as平均金额FROM kh； GROUP BY职业INTO DBF temp 执行该语句后temp表中第2条记录的“平均金额”字段的内容是( )。A．40000B．50000C．60000D．70000

[单选题]求每个交易所的平均单价的SQL语句是A．)SELECT交易所，avg(单价）FROM stock GRDER BY单价B．)SELECT交易所，avg(单价）FROM stock ORDER BY单价C．)SELECT交易所，avg(单价）FROM stock ORDER BY交易所D．)SELECT交易所，avg(单价）FROM stock GROUP BY交易所

[单选题]有如下SQL语句SELECT 股票代码，avg（单价）as 均价 FROM stock；GROUP BY 交易所 INTO DBF temp执行该语句后，temp表中第二条记录的“均价”字段用SQL语句A)7.48 B)9.99 C)11.73 D)15.20

[单选题]有如下SQL语句 SELECT交易所,avg(单价)as均价FROM stock； GROUP BY交易所INTO DBT temp 执行该语句后temp表中第2条记录的“均价”字段的内容是_______。

[单选题]有如下SQL语句 SELECT 股票代码，avg(单价) as 均价FROM stock； GROUP BY交易所INTO DBF temp 执行该语句后，temp表中第二条记录的“均价”字段的内容是A．7.48B．9.99C．11.73D．15.20

[单选题]有如下SQL语句 SELECT交易所,avg(单价)as均价FROM stock； GROUP BY 交易所 INTO DBF temp 执行该语句后temp表中第2条记录的“均价”字段的内容是______。A．7.48B．9.99C．11.73D．15.20