Monday, May 26, 2014

Store count of thf rows to arraylist




Hello,




I tried to count the rows of each attribute which called "wbuch", any way i use the following sql request:






Java Code:






SELECT wbuch, COUNt(*) FROM myTable GROUP BY wbuch;




And the result was the following table:



+-------+----------+-----+



| wbuch | COUNt(*) |



+-------+-----------------+



| 12 | 15 |



| 13 | 334 |



| 15 | 20 |



| 16 | 488 |



| 17 | 16 |



| 20 | 252 |



| 21 | 24 |



| 23 | 599 |



| 30 | 599 |



| 31 | 508 |



| 33 | 599 |



| 34 | 491 |



| 35 | 571 |



| 36 | 643 |



| 37 | 152 |



| 46 | 419 |



+-------+------------------+

any way i want to store the row number's of each "wbuch" in arry list, but i didnt get it






Java Code:






public List<Integer> WbSeiten(){
private List<Integer> wbList = new ArrayList<>();
int rowCount = 0;
try (Statement stmt = con.createStatement();) {
String sql = "SELECT wbuch, COUNt(*) FROM myTable "
+ "GROUP BY wbuch";
ResultSet result = stmt.executeQuery(sql);
while (result.next()) {
rowCount =result.getInt("COUNt(*)");
wbList.add(rowCount);
}
} catch (SQLException e) {
}
return wbList;
}




what is wrong with my snippet ?? And how to do it correctly




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