数据类型	数据类型简写	标准命名举例
connection	con	connorthwind
command	cmd	cmdreturnproducts
parameter	parm	parmproductid
dataadapter	dad	dadproducts
datareader	dtr	dtrproducts
dataset	dst	dstnorthwind
datatable	dtbl	dtblproduct
datarow	drow	drowrow98
datacolumn	dcol	dcolproductid
datarelation	drel	drelmasterdetail
dataview	dvw	dvwfilteredproducts