Missing Semicolon (;) At End Of SQL Statement

Code:

<%@Language = "VBScript"%>
<%Option Explicit%>
<%
dim oRs,oConn,dateofleave,sql,uid

dateofleave = trim(request.querystring("leavedate"))

uid = trim(request.querystring("employeeID"))

set oConn = Server.CreateObject("ADODB.Connection")
oConn.Provider="Microsoft.Jet.OLEDB.4.0"
oConn.Open(Server.MapPath("test.mdb"))

set oRs = Server.CreateObject("ADODB.Recordset")
sql ="INSERT INTO test (dateofleave)"
sql = sql & "VALUES ('&dateofleave') WHERE employeeID=&uid"

set oRs = oConn.execute(sql)

%>



can someone help me with this error?
Microsoft JET Database Engine- Error '80040e14'

Missing semicolon ( at end of SQL statement.

/test/booking.asp, line 18

where line 18 is "set oRs = oConn.execute(sql)"