VBA查询、新增SQL数据库

我现在需要的是如何向SQL数据库批量新增、修改、删除数据。请举简单的例子。
本人初学，略懂一二，经过整理网上各种零碎信息，现总结如下两点，欢迎大家加Q：493196216一起讨论。
1，通过VBA查询SQL数据库数据：
Sub 查询()
Dim cnn As New ADODB.Connection
Dim rs As ADODB.Recordset
Dim CnStr As String, SQL As String
CnStr = "Provider=SQLOLEDB;Persist Security Info=True;User ID=sa;Password=111111;Initial Catalog=DB_22"
cnn.Open CnStr
SQL = "select a.os_id,a.os_no,a.cus_no,b.name from mf_pos a left join cust b on a.cus_no=b.cus_no"
Set rs = New ADODB.Recordset
rs.Open SQL, cnn
With Sheet9
.Range("a1").CopyFromRecordset rs
.Cells.EntireColumn.AutoFit
End With
rs.Close
End Sub

2，通过VBA向SQL插入单元格数据：
Sub EXCEL写入SQL2008()
Dim cnn As New ADODB.Connection
Dim rs As ADODB.Recordset
Dim CnStr As String, SQL As String
Dim bgz As String
bgz = Sheet11.[a1].Value

CnStr = "Provider=SQLOLEDB;Persist Security Info=True;User ID=sa;Password=111111;Initial Catalog=DB_A"
cnn.Open CnStr

SQL = "select * from A1 where x='" & bgz & "'"
Set rs = New ADODB.Recordset
rs.Open SQL, cnn, adOpenKeyset, adLockOptimistic
If rs.BOF And rs.EOF Then'当记录集为空时
rs.AddNew'记录集添加新记录
rs.Fields(1) = bgz'为新记录赋值
rs.Update'更新记录集
End If

rs.Close
End Sub