Count the number of occurence in table with toplink
Hi !
there is no way to build a query with expressionbuilder or .... to count the number of occurences in my table ?
i don't want use query " select count(*) from table "
thanks
Not sure of the question. Are you looking to get the sql "select count(*) from table" from using the TopLink expression framework or are you getting that SQL already and want something else?
If you are looking just to get the count from a table/class, you can use a ReportQuery:
ReportQuery rquery = new ReportQuery(ClassToQueryOn.class);
rquery.addCount(); //equivalent to count(*);
session.executeQuery(rquery);
You can use a report query to return data instead of objects, and use selection criteria just like a normal read query.
Best Regards,
Chris
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Counting the number of occurences in a table column
Hi All
I have a table with a column that contains approx. 5000 6-digit codes. A number of these codes are duplicted in the column, and I want to count the number of occurences of each code. The column looks a bit like -
WCID
940042
920012
940652
940199
188949
155146
155196
174196
152148
151281
196209
174015
182163
195465
195318
182008
189589
150675
There can be mulitple instances of each WCID and I need to count the number of instances of each. I also have access to another table that also has a column of each WCID, but only once - ie no multiple instances. The second table is identical except that there are only single instances of each WCID.
I thought I could either loop through on the table to be counted, from 100000 to 999999 and count each occurence that way, but it would be very inefficient. The other way I thought would be to perhaps select a WCID from the unique table, count the occurence of that, select the next WCID from the unique table, count that and so on, however I'm not sure how to do it in PL/SQL. Perhaps select the WCID from the unique table into a cursor, loop through that and compare it with the original table and count the instances?
I hope this makes some sense, any help would be really appreciated
Thanks
BillHi, Bill,
That sounds like a job for GROUP BY:
SELECT wcid
, COUNT (*) AS num_found
FROM table_x
GROUP BY wcid
ORDER BY wcid
I hope that answers your question.
If not, post CREATE TABLE and INSERT statements for a little sample data, and the results you want from that data. -
Count the number of occurences of a pattern in some files
Hi,
I am trying to extract some patterns in files using regex. I can easily extract the patterns using my program. I also wanted to count the number of occurences of the pattern in the files. For that I have written this code:
int count=0;
while (m.find())
System.out.println("Found Patterns: "+m.group());
count++;
System.out.println(count); //giving error saying identifier expectedUnfortunately I am getting an error saying identifier expected at the count line. What to do?
ThanksCheapside-Poultry wrote:
Move the } down one line so the count is in scope.No, it looks like he just forgot the opening { with the while. -
I need to WAP to count the number of occurences of an alphabet in a string.
I need to WAP to count the number of occurences of an alphabet in a string.I tried a lot and have surfed a lot regarding this problem.
I m not the most proficient with java.but this is all i could come up with,and would appreciate some help here.I hope you guys would help me find a solution to this.
e.g String : abcabrty
Result should be
a:2
b:2
c:1
r:1
t:1
y:1
public class chkoccurences
public static void main(String args[ ])
String user_Data=args[0];
int counter=0;
try
for(int i=0;i<user_Data.length( );i++)
for(int j=0;j<user_Data.length( );j++)
if(user_Data.charAt(i) == user_Data.charAt(j))
counter++;
System.out.println(user_Data.charAt(i)+" exists "+counter+" time(s) in the word.");
System.out.println(" ");
catch(ArrayIndexOutOfBoundsException e)
System.out.println("Check the array size.");
}This is the output i get out of the program:
a exists 2 time(s) in the word.
b exists 4 time(s) in the word.
c exists 5 time(s) in the word.
a exists 7 time(s) in the word.
b exists 9 time(s) in the word.
r exists 10 time(s) in the word.
t exists 11 time(s) in the word.
y exists 12 time(s) in the word.What i think is i need an array to store the repeated characters because the repeated characters are getting counted again in the loop,if you know what i mean.
Please, i would appreciate some help here.Criticism is welcomed
public class tests {
final int min = 10;
final int max = 35;
final char[] chars = new char[] {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h',
'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u',
'v', 'w', 'x', 'y', 'z'};
public static void main(String[] args){
tests t = new tests();
String[] strings = new String[] {"aabcze", "att3%a", ""};
for(String s : strings){
System.out.println(t.getAlphaCount(s));
public String getAlphaCount(String s){
int[] alphaCount = new int[26];
int val;
for(char c : s.toCharArray()){
val = Character.getNumericValue(c);
if( (val>=min) && (val<=max)){
alphaCount[val-min]++;
StringBuilder result = new StringBuilder();
for(int i=0; i<alphaCount.length; i++){
if(alphaCount[i] > 0){
result.append(chars[i] + ":" + alphaCount[i] + ", ");
if(result.length() != 0){
result.delete(result.length()-2, result.length());
return result.toString();
} -
To count the number of occurences of a character
Hi All,
Is there a particular function to count the number of occurences of a particular character in a string...?
Let me know if u know the same.
Thanx and regards
AkshatA method with a test driver:
public class a {
public static void main(String args[]) {
System.out.println(howmany(args[0],args[1].charAt(0)));
public static int howmany(String what,char c) {
String regexp = "" + c;
String s=null;
try {
s=what.replaceAll(regexp,"");
catch (Exception e) {
regexp = "\\" + c;
s=what.replaceAll(regexp,"");
return what.length() - s.length();
} -
How to count the number of occurences of a character
hi
wat command is used to count the number of occurences of a charcter in a line?
i have to count the number of '.' in a lineFIND
Searches for patterns.
Syntax
FIND <p> IN [SECTION OFFSET <off> LENGTH <len> OF] <text>
[IGNORING CASE|RESPECTING CASE]
[IN BYTE MODE|IN CHARACTER MODE]
[MATCH OFFSET <o>] [MATCH LENGTH <l>].
The system searches the field <text> for the pattern <p>. The SECTION OFFSET <off> LENGTH <len> OF addition tells the system to search only from the <off> position in the length <len>. IGNORING CASE or RESPECTING CASE (default) specifies whether the search is to be case-sensitive. In Unicode programs, you must specify whether the statement is a character or byte operation, using the IN BYTE MODE or IN CHARACTER MODE (default) additions. The MATCH OFFSET and MATCH LENGTH additions set the offset of the first occurrence and length of the search string in the fields <p> and <l>. -
Fastest way to count the number of occurences of string in file
I have an application that will process a number of records in a plain text file, and the processing takes a long time. Therefore, I'd like to first calculate the number of records in the file so that I can display a progress dialog to the user (e.g. " 1234 out of 5678 records processed"). The records are separated by the string "//" followed by a newline, so all I need to do to get the number of records is to count the number of times that '//' occurs in the file. What's the quickest way to do this? On a test file of ~1.5 Gb with ~500 000 records, grep manages under 5 seconds, whereas a naive Java approach:
BufferedReader bout = new BufferedReader (new FileReader (sourcefile));
String ffline = null;
int lcnt = 0;
int searchCount = 0;
while ((ffline = bout.readLine()) != null) {
lcnt++;
for(int searchIndex=0;searchIndex<ffline.length();) {
int index=ffline.indexOf(searchFor,searchIndex);
if(index!=-1) {
//System.out.println("Line number " + lcnt);
searchCount++;
searchIndex+=index+searchLength;
} else {
break;
}takes about 10 times as long:
martin@martin-laptop:~$ time grep -c '//' Desktop/moresequences.gb
544064
real 0m4.449s
user 0m3.880s
sys 0m0.544s
martin@martin-laptop:~$ time java WordCounter Desktop/moresequences.gb
SearchCount = 544064
real 0m42.719s
user 0m40.843s
sys 0m1.232sI suspect that dealing with the file as a whole, rather than line-by-line, might be quicker, based on previous experience with Perl.Reading lines is very slow. If your file has single byte character encoding then use something like the KMP algorithm on an BufferedInputStream to find the byte sequence of "//\n".getBytes(). If the file has a multi-byte encoding then use the KMP algorithm on a BufferedReader to find the chars "//\n".getCharacters() .
The basis for this can be found in reply #12 of http://forum.java.sun.com/thread.jspa?threadID=769325&messageID=4386201 .
Edited by: sabre150 on May 2, 2008 2:10 PM -
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Not sure of the question. Are you looking to get the sql "select count(*) from table" from using the TopLink expression framework or are you getting that SQL already and want something else?
If you are looking just to get the count from a table/class, you can use a ReportQuery:
ReportQuery rquery = new ReportQuery(ClassToQueryOn.class);
rquery.addCount(); //equivalent to count(*);
session.executeQuery(rquery);
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Best Regards,
Chris -
How do I count the number of cells with a particular text in it?
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Hi Evilhomer,
The function COUNTIF will do this. Here are two Tables on one sheet. Table 1 contains names in Column B.
Table 2 contains the names once only (in any order) in Column A, with a COUNTIF formula in Column B to count how many times a name occurs in Table 1.
The formula in Sheet 2, Cell B2 is:
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Enter the formula in B2 then copy down.
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Regards,
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On home page there is a Tab called Count and I want to show the count on the right corner of this tab button.
Please helpCreate an application item. APP_HOME_COUNT.
Create an application process:
make the application process type "on new instance" if you only want this to run once
make it "on load before header" if you want to have the value set every page load
application process source:
select count(*) into APP_HOME_COUNT from <your table>
modify the tab name to reference the app item, maybe something like "Count(&APP_HOME_COUNT.)"
result should look like this "Count(5)"
Good Luck,
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Do you have an idea about the table name or tcode to count the number of Dimensions and Key Figures of an Infocube WITHOUT installing the cube from Business Content?
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AjayHi,
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One thing you could do is go to the Business Content Tab, select "Infoproviders by InfoArea" on the left side, look for the Cube or DSO you want to check, right click on it and select "Display Description".
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Luis -
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We're going to need a little more info about your application before we can get you a compete answer.
Your 6601 is a counter/timer board that can count and measure TTL pulses.
You can get the pinout for your board from the user manual found here: http://digital.ni.com/manuals.nsf/websearch/dd0dbb6404bc139886256721007cf16d
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Help with how to count the number of tokens from the first line
Hi
I want to count the number of tokens from the first line of text, from my incoming file and print it out.
For example i have 12 tokens in the first line, so i want it to print out the number 12
my code is below
thanks
import java.io.*;
import java.util.*;
import java.lang.*;
import java.util.StringTokenizer.*;
import java.sql.*;
public class Data {
public static void main(String[] args) {
String token = null;
String currentToken = "";
Hashtable hh = new Hashtable();
try {
Vector v2 = new Vector(100);
Vector v = new Vector(100);
FileReader file = new FileReader("words.txt");
BufferedReader buff = new BufferedReader(file);
String line = buff.readLine();
StringTokenizer s = null;
boolean eof = false;
while (!eof){
s = new StringTokenizer(line.trim(),",",true);
boolean lastToken = true;
while (s.hasMoreTokens()) {
token = s.nextToken();
if (lastToken){
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v.add("");
lastToken = false;
if (! token.equals(",")) {
v.add(token);
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currentToken = token;
if (token.equals(",")) {
v.add("");
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System.out.println("Error - - " + ne.toString());
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System.out.println("Error - - " + e.toString());
} 2.I can print out the amount of tokens from each line,
But i only want the first line to be counted, And i
also do not want the delimeters to be counted.
could you please give me some ideas?
Thanks
try
BufferedReader br = new BufferedReader(new FileReader("item.kr"));
while((str=br.readLine())!= null)
itemslist.add(str);
catch(IOException ioe)
System.out.println("Exception Occurred!!!");
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Then i would count (By useing a diffrent String Tokenizer) to count only this line!!! -
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How do i count the number of records in an internal table without using the loop statement.
The Describe statement give the total no. of records in the internal table.But i want the count of the key fields in the internal table
For eg
Row Field
1 A
2 A
3 A
4 B
5 B
6 C
Count of A = 3
Count of B = 2
Count of C = 1Dilip,
I think isn't posible. Only 3 ideas:
1ª, make other table "table2", similar to your actual table.
table2[] = yourtable[].
delete table2 where key <> 'A'.
describe table table2 lines contA.
But depending the amount of data, you may have problems in performance or memory consumption...
2ª, make other table, only with the keys fields and a count field,
data begin table2
key_field1,
cont type i.
end data.
when you append lines to yourdata, make a collect to this table:
table2-keys = yourtable-keys.
table2-cont = 1.
collect table2.
But only works if you can modify the program where data is appended, and you may be carefull when data is deleted :-(...
3ª if your data if filled in a select, you may fill the table2 of point 2ª, making a similar select but:
select keyfields count( * ) into table table2
from ...
where (the same you have to fill your original table...)
group by keys.
But you have the same problem is data is deleted later...
I hope that any of the three is useful for you...
Edited by: Diego Alvarez on Jan 5, 2010 5:09 PM -
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I need to break up this string and run my process for each value ( i.e for 1,2,100 and 201).
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===========================
with t as (select '10,aaaa,20,vvvvv,30,xxx''xx,12,12,56' txt from dual)
select substr( txt
, decode(level, 1, 1, instr(txt, ',', 1, level-1)+1)
, decode(instr(txt, ',', 1, level), 0, length(txt), instr(txt, ',', 1, level)
- decode(level, 1, 0, instr(txt, ',', 1, level-1))-1)
) val
from t
connect by level <= length(txt)-length(replace(txt,','))+1
VAL
10
aaaa
20
vvvvv
30
xxx'xx
12
12
56
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===============================================
with t as (select 'aaaa,,bbbb,cccc,dddd,eeee,ffff' as txt from dual)
-- end of sample data
select REGEXP_SUBSTR (txt, '[^,]+', 1, level)
from t
connect by level <= length(regexp_replace(txt,'[^,]*'))+1
REGEXP_SUBSTR(TXT,'[^,]+',1,LE
aaaa
bbbb
cccc
dddd
eeee
ffff
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SQL> ed
Wrote file afiedt.buf
1 select *
2 from emp
3 where ename in (
4 with t as (select '&input_string' as txt from dual)
5 select REGEXP_SUBSTR (txt, '[^,]+', 1, level)
6 from t
7 connect by level <= length(regexp_replace(txt,'[^,]*'))+1
8* )
SQL> /
Enter value for input_string: SCOTT,JAMES
old 4: with t as (select '&input_string' as txt from dual)
new 4: with t as (select 'SCOTT,JAMES' as txt from dual)
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7788 SCOTT ANALYST 7566 19-04-1987 00:00:00 3000 20
7900 JAMES CLERK 7698 03-12-1981 00:00:00 950 30
SQL>3. Split 10g onwards using XMLTABLE...
======================================
SQL> ed
Wrote file afiedt.buf
1 with t as (select 'This is some sample text that needs splitting into words' as txt from dual)
2 select x.*
3 from t
4 ,xmltable('x/y'
5 passing xmltype('<x><y>'||replace(t.txt,' ','</y><y>')||'</y></x>')
6 columns word varchar2(20) path '.'
7* ) x
SQL> /
WORD
This
is
some
sample
text
that
needs
splitting
into
words
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