Main   Products   Offshore Outsourcing   Customers   Partners   ContactUs  
JDBC Databases
  HXTT Access v6.0
  HXTT Cobol v3.0
  HXTT DBF v6.0
 
  Buy Now
  Support
  Download
  Document
  FAQ
  HXTT Excel v5.0
  HXTT Paradox v6.0
  HXTT Text(CSV) v6.0
  HXTT XML v2.0
Offshore Outsourcing
Free Resources
  Firewall Tunneling
  Search Indexing Robot
  Conditional Compilation
  Password Recovery for MS Access
  Password Recovery for Corel Paradox
  Checksum Tool for MD5
  Character Set Converter
  Pyramid - Poker of ZYH
   
   
   
Heng Xing Tian Tai Ltd. of Beijing City (abbr, HXTT)

HXTT DBF
union statement
dms
2010-11-08 02:02:30.0
Hi

The union statement seems to work incorrectly. Only one table is counted;

Code:
String A = "select AREA_CODE as X_DATA, COUNT(AREA_CODE) as Y_VALUE1 from feedback where FIN_DATE >= '2000-01-01' and FIN_DATE <= '2011-12-08' and AREA_CODE like '%%' and LOC_NUMBER like '%%' and FAIL_MODE like '%%' and RESOURCE like '%%' and WORKSHOP like '%%' and BD_CODE like '%%' group by AREA_CODE " ;

String B = " select AREA_CODE as X_DATA,COUNT(AREA_CODE) as Y_VALUE1 from feedback_arc where FIN_DATE >= '2000-01-01' and FIN_DATE <= '2011-12-08' and AREA_CODE like '%%' and LOC_NUMBER like '%%' and FAIL_MODE like '%%' and RESOURCE like '%%' and WORKSHOP like '%%' and BD_CODE like '%%' group by AREA_CODE";

String sql1 = A+ " UNION "+B;

Connection conn = DriverManager.getConnection("jdbc:dbf:/d:/dms2000/data/dms?lockType=DBASE4BDE");
PreparedStatement ps = conn.prepareStatement(sql1, ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
ps.executeQuery();
ResultSet rs = ps.getResultSet();

while(rs.next()){
System.out.println(rs.getString("x_data")+" "+rs.getString("X_DATA")+" "+rs.getDouble("Y_VALUE1"));
}

result;
Re:union statement
HXTT Support
2010-11-08 02:22:37.0
Passed test with test code:
aaa 1
bbb 1
The total row number of resultset: 2

Please check whether one of your sql will return empty result. For instance,
aaa 1
The total row number of resultset: 1
Because feedback_arc hasn't data rows.

Search Key   Search by Last 50 Questions




Google
 

Email: webmaster@hxtt.com
Copyright © 1999-2017 Heng Xing Tian Tai Ltd. of Beijing City. | All Rights Reserved. | Privacy | Legal | Sitemap