Trouble adding multiple parameters to Command Query

Question

<p>I am trying to calculate the calendar days each unit is in use.  For each job a unit has a arrival date and a departure date. A unit may work on more than one job in a day, or on 1 job for more then 1 day</p><p>For example the table look like this, if I have unit #10 and it works as follows<br />Unit   Job        Arrival        Departure<br />10        1         Jan 1            Jan 1<br />10        2         Jan 2            Jan 3<br />10        3         Jan 3            Jan 3<br />10        4         Jan 5            Jan 6           <br /><br />And I want my report to show<br />Unit       Days worked<br />10         5<br /><br />So the Unit actually works on 5 days beween Jan 1 and Jan 6.  I am able to write a query to get this information but I am having trouble creating this in Crystal Reports XI.  I have tried adding my query to the report using "add Command" however when I try to replace my hard coded dates with parameters, I am able to add 1 parameter (From Date) but when I add the (To Date) paramater I get an error "Failed to retrieve data from database ORA00911- Invalid Character"  I&#39;m not sure why it doens&#39;t allow me to add the second date parameter.  I don&#39;t know if there is a better wa to do this within Crystal reports itself.</p>

Answer 1

Please re-post if this is still an issue and please specify versions.