How to Compare two strings in PL/SQL

Hi All,
I need to compare two strings whether they are equal or not in PL/SQL.Is there any function to comparing the strings.

Yes, the = sign.
Are you after something like:
IF v_string1 = v_string2 THEN
ELSE
END IF;?
Edited by: Boneist on 27-Aug-2009 11:41

Similar Messages

How to compare two rows in PL/SQL?

Hi All,
How to compare two rows in PL/SQL? Is there any method that I can use instead of comparing them column by column?
Any feedback would be highly appreciated.

PhoenixBai wrote:
Hi All,
How to compare two rows in PL/SQL? Is there any method that I can use instead of comparing them column by column?What "rows" are you referring to?
If you're talking of rows within a PL/SQL associative array there are techniques as described in the documentation... e.g.
SQL> ed
Wrote file afiedt.buf
1 declare
2    type v1 is table of number;
3    r1 v1 := v1(1,2,4);
4    r2 v1 := v1(1,2,3);
5 begin
6    if r1 MULTISET EXCEPT DISTINCT r2 = v1() then
7      dbms_output.put_line('Same');
8    else
9      dbms_output.put_line('Different');
10    end if;
11* end;
SQL> /
Different
PL/SQL procedure successfully completed.
SQL> ed
Wrote file afiedt.buf
1 declare
2    type v1 is table of number;
3    r1 v1 := v1(1,2,3);
4    r2 v1 := v1(1,2,3);
5 begin
6    if r1 MULTISET EXCEPT DISTINCT r2 = v1() then
7      dbms_output.put_line('Same');
8    else
9      dbms_output.put_line('Different');
10    end if;
11* end;
SQL> /
Same
PL/SQL procedure successfully completed.
SQL>If you're talking about rows on a table then you can use the MINUS set operator to find the rows that differ between two sets of data...
SQL> select * from emp;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
      7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
      7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
14 rows selected.
SQL> select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7521 WARD       SALESMAN        7698 22-FEB-1981 00:00:00       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-1981 00:00:00       2975                    20
      7782 CLARK      MANAGER         7839 09-JUN-1981 00:00:00       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-1987 00:00:00       3000                    20
      7839 KING       PRESIDENT            17-NOV-1981 00:00:00       5000                    10
      7900 JAMES      CLERK           7698 03-DEC-1981 00:00:00        950                    30
      7934 MILLER     CLERK           7782 23-JAN-1982 00:00:00       1300                    10
7 rows selected.
SQL> select * from emp
2 minus
3 select * from emp2;
     EMPNO ENAME      JOB              MGR HIREDATE                    SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-1980 00:00:00        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-1981 00:00:00       1600        300         30
      7654 MARTIN     SALESMAN        7698 28-SEP-1981 00:00:00       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-1981 00:00:00       2850                    30
      7844 TURNER     SALESMAN        7698 08-SEP-1981 00:00:00       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-1987 00:00:00       1100                    20
      7902 FORD       ANALYST         7566 03-DEC-1981 00:00:00       3000                    20
7 rows selected.If you actually need to know what columns data is different on "non-matching" rows (based on your primary key) then you'll have to compare column by column.

How to compare two strings whether both are equal while ignoring the difference in special characters (example: & vs & and many others)?

I attempted to compare two strings whether they are equal or not. They should return true if both are equal.
One string is based on Taxonomy's Term (i.e. Term.Name) whereas other string is based on String object.
The problem is that both strings which seem equal return false instead of true. Both string values have different special characters though their special characters are ＆ and &
Snapshot of different design & same symbols:
Is it due to different culture or language?
How to compare two strings whether both are equal while ignoring the difference in special characters (＆ vs &)?

Hi Jerioon,
If you have a list of possible ambiguous characters the job is going to be easy and if (＆ vs &) are the only charracters in concern awesome.
You can use the below solution.
Before comparing pass the variables through a replace function to standarize the char set.
$Var = Replace($Var,"＆","&")
This is going to make sure you don't end up with ambiguous characters failing the comparison and all the char are "&" in this case.
Similar technique is used to ignore Character Cases 'a' vs. 'A'
Regards,
Satyajit
Please “Vote As Helpful”
if you find my contribution useful or “Mark As Answer” if it does answer your question. That will encourage me - and others - to take time out to help you.

How to compare two schemas in Oracle sql developer

Hello,
I need to compare both the data and schemas details (columns etc) between two schemas on different databases (connections).
What is the easiest and most efficient way to do this? Hopefully in Oracle Sql Developer or Sql Plus?
Thanks.

In SQL Developer go to Tools -> Schema Diff !
in SQL* Plus you will need to write PL/SQL for this.
Amardeep Sidhu

How to compare two rows in PL/SQL and retrieve the values?

Hello,
I have two tables which have identical schemas, one table (tbl_store) is used to hold the latest version, and the other table (tbl_store_audit) holds previous versions. When the latest record is updated, it is inserted into the tbl_store_audit table as a revision, and the updated details are used as the latest record.
For example: The latest version is held in tbl_store, however the tbl_store_audit may hold 5 records which are the past records used before changes were made - these are seen as revisions.
I want to be able to compare what has changed between each revision in the tbl_store_audit table. For example: Out of the 10 columns, the change between revision 1 and revision 2 was the size from XL to XXL. The change between revision 3 and revision 4 was the size XS to M and price 4.99 to 10.99, and so on.
Eventually i will create an APEX report that will show the user the revision number and what was changed from and to.
I seen in a previous post i need to note my oracle version: Oracle version 10.2.0.4.0

Hi,
Like suggested already you should give some sample data and output.
Maybe you would like to have something like this:
-- Sample data
-- Note PK is the primairy key of the source table and rev are the revisions
with tbl_store_audit as
select 1 pk, 1 rev , 1 price , 'XXL' unit_size from dual union all
select 1 pk, 2 rev , 1 price,   'XL' unit_size from dual union all
select 1 pk, 3 rev , 1.4 price, 'XXL' unit_size from dual union all
select 2 pk, 1 rev , 1.4 price, 'XL' unit_size from dual union all
select 2 pk, 2 rev , 1.4 price, 'XL' unit_size from dual union all
select 2 pk, 3 rev , 1.4 price, 'XL' unit_size from dual union all
select 1 pk, 4 rev , 1 price , 'XL' unit_size from dual union all
select 1 pk, 5 rev , 1 price , 'XL' unit_size from dual union all
select 3 pk, 1 rev , 1.2 price, 'XL' unit_size from dual union all
select 3 pk, 2 rev , 1.2 price, 'XXL' unit_size from dual union all
select 4 pk, 1 rev , 1 price , 'XL' unit_size from dual
-- end of sample data
,tbl_store_audit_tmp as
select
pk
,rev
,'PRICE'          field_name
,to_char(price)   field_value
,to_char(lag(price,1) over (partition by pk order by rev) ) old_field_value
from
tbl_store_audit
union all
select
pk
,rev
,'UNIT_SIZE'           field_name
,to_char(UNIT_SIZE)    field_value
,to_char(lag(UNIT_SIZE,1) over (partition by pk order by rev) ) old_field_value
from
tbl_store_audit
-- include all other fields from the table here with it's own union all select ...
select
from
tbl_store_audit_tmp
where
field_value != old_field_value
PK REV FIELD_NAME FIELD_VALUE                              OLD_FIELD_VALUE
1   3 PRICE      1.4                                      1
1   4 PRICE      1                                        1.4
1   2 UNIT_SIZE XL                                       XXL
1   3 UNIT_SIZE XXL                                      XL
1   4 UNIT_SIZE XL                                       XXL
3   2 UNIT_SIZE XXL                                      XL
6 rows selected If you realy want to keep track of all the changes I think it would be better if you make a "after update trigger" on the base table that checks what changed and put that directly in the uadit table.
Regards,
Peter
Edited by: Peter vd Zwan on Aug 16, 2012 8:25 AM

How to compare two strings with each other?

Hello,
I have modeled a formular which has a radio group and a button. Furthermore, I have one result state corresponding to each option in the radio group.
In order to determine which result state actually is to be reached I want to attach a condition to each flow to the result states that tests which option has been chosen.
Which operator can I use for writing these conditions? I have tried the "like" operator as well as the "==" operator but neither seems to work.
I have written something like:
=LIKE(@decision, 'option a')
as well as:
=(@decision=='option a')
What am I doing wrong here?
Thank you very much
Alexander

Hi Alexander,
Could this be an Upper/Lower case issue.
I tried the following expression
=(@TXT1=="opt a")
and it worked.
If you want your expression to ignore case you should use this expression:
=(UPPER(@TXT1)==UPPER("opt a"))
In case you're not sure what is the exact string in the field (@decision) you can always use the PROMPT action to display the field's value.
Regards,
Udi

How to Compare Two Strng without .equals() method

Hiii,
How to compare two Strings with out .equals method if there are white spaces in between these string it should be avoided..
eg: ab cd ef g is equal to a bc de fg
Please give me the logic or code..
Your help will be appreciated

dude find the code without the equal method
public class test {
     public static void main(String args[])
          String str = "ab cd ef g" ;
          String str1 = "a bc de fg";
          char []ch = str.toCharArray();
          char []ch1 = str1.toCharArray();
          int counter =0, counter1 = 0;
          while(counter < ch.length && counter1 < ch1.length)
               while(ch[counter]==' ')
                    counter++;
               while(ch1[counter1]==' ')
                    counter1++;
               if(ch[counter] != ch1[counter1])
                    break;
               counter++; counter1++;
          if(counter == ch.length && counter1 == ch1.length)
               System.out.println("true");
          else
               System.out.println("false");
}

How to compare two files in java & uncommon text should print in text file.

Hi,
Can any one help me to write Core java program for this.
How to compare two files in java & uncommon text should print in other text file.
thanks
Sam

Hi All,
i m comparing two HTML file.. thats why i am getting problem..
import java.io.BufferedReader;
import java.io.FileReader;
public class textmatch{
public static void main(String[] argv)
throws Exception{
BufferedReader fh =new BufferedReader(new FileReader("internal.html"),1024);
BufferedReader sh = new BufferedReader(new FileReader("external.html"),1024);
String s;
String y;
while ((s=fh.readLine())!=null)
if ( s.equals(y=sh.readLine()) ){
System.out.println(s + " " + y); //REMOVE THIS PRINTLN STATEMENT IF YOU JUST WANT TO SHOW THE SIMILARITIES
sh.close();
fh.close(); }
thanks
Sam

How to compare two files in Java & uncommon text should print in Diff text

Hi All,
can any one help me to write a java program..
How to compare two files in Java & uncommon text should print in Diff text file..
Thanks
Sam

Hi All,
i m comparing two HTML file.. thats why i am getting problem..
import java.io.BufferedReader;
import java.io.FileReader;
public class textmatch{
public static void main(String[] argv)
throws Exception{
BufferedReader fh =new BufferedReader(new FileReader("internal.html"),1024);
BufferedReader sh = new BufferedReader(new FileReader("external.html"),1024);
String s;
String y;
while ((s=fh.readLine())!=null)
if ( s.equals(y=sh.readLine()) ){
System.out.println(s + " " + y); //REMOVE THIS PRINTLN STATEMENT IF YOU JUST WANT TO SHOW THE SIMILARITIES
sh.close();
fh.close(); }
thanks
Sam

Compare two string in different line in textarea

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TextCounterPanel extends JPanel {
private JTextArea textInput;
private JLabel lineCountLabel;
                    public TextCounterPanel() {
                    setBackground(Color.DARK_GRAY);
                    textInput = new JTextArea();
                    textInput.setBackground(Color.WHITE);
                    JPanel south = new JPanel();
                    south.setBackground(Color.DARK_GRAY);
                    south.setLayout( new GridLayout(4,1,2,2) );
                         JButton countButton = new JButton("Process the Text");
                         countButton.addActionListener( new ActionListener() {
                              public void actionPerformed(ActionEvent evt) {
                                   processInput();
                         south.add(countButton);
                    lineCountLabel = new JLabel(" Number of lines:");
                    lineCountLabel.setBackground(Color.WHITE);
                    lineCountLabel.setForeground(Color.BLUE);
                    lineCountLabel.setOpaque(true);
                    south.add(lineCountLabel);
                    setLayout( new BorderLayout(2,2) );
                    setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY));
                    JScrollPane scroller = new JScrollPane( textInput );
                    add(scroller, BorderLayout.CENTER);
                    add(south, BorderLayout.SOUTH);
public void processInput() {
String text,vin; // The user's input from the text area.
text = textInput.getText();
vin =text.substring(25,42);
lineCountLabel.setText(" vin: " + vin);
} // end class TextCounterPanel
How can I compare two string in different line in text area

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class TextCounterPanel extends JPanel {
private JTextArea textInput;
private JLabel lineCountLabel;
public TextCounterPanel() {
setBackground(Color.DARK_GRAY);
textInput = new JTextArea();
textInput.setBackground(Color.WHITE);
JPanel south = new JPanel();
south.setBackground(Color.DARK_GRAY);
south.setLayout( new GridLayout(4,1,2,2) );
JButton countButton = new JButton("Process the Text");
countButton.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent evt) {
processInput();
south.add(countButton);
lineCountLabel = new JLabel(" Number of lines:");
lineCountLabel.setBackground(Color.WHITE);
lineCountLabel.setForeground(Color.BLUE);
lineCountLabel.setOpaque(true);
south.add(lineCountLabel);
setLayout( new BorderLayout(2,2) );
setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY));
JScrollPane scroller = new JScrollPane( textInput );
add(scroller, BorderLayout.CENTER);
add(south, BorderLayout.SOUTH);
public void processInput() {
String text,vin; // The user's input from the text area.
text = textInput.getText();
vin =text.substring(25,42);
lineCountLabel.setText(" vin: " + vin);
} // end class TextCounterPanel

Compare two strings for partial or full match

I have been trying to figure out away of comparing two strings.
I can get the full string matching to successfully work but am struggling on how to get partial eg wildcard search working.
say I had names like paul Duncan, George Morrison.
I have split them up so its now paul , duncan i then use the users entered string to compare it against the name name to see if it matches anything in the first name or the last name if it does i added it to an arraylist.
however i have tried t use a indexof as i believe this looks for similarity (Substring matches?) but it always returns -1.
Could anyone possibly direct me to a method that will allow me to use partial text string to match it against stored user names.
eg user enters pa
I would return anything that would contain pa
thanks for any help

thank you for the reply
Sorry I forgot to put in the code.
This is a reduced down version including the read in from a text file as well as the index of if statement and the adding of it to an array list.
public class FindContact {
String res;
/** Creates a new instance of FindContact */
public FindContact() {
public Object[] FindAUser(String passSearch) {
System.out.println("getting here");
ArrayList found = new ArrayList();
String patternStr = ",";
int j, i = 0;
try {
BufferedReader in = new BufferedReader(new FileReader("H:\\out.txt"));
String str;
while ((str = in.readLine()) != null) {
String[] fields = str.split(patternStr);
//for(j=0;j < fields.length;j++) {
if (fields.length != 0) {
if (passSearch.indexOf(fields[0])!=-1 || passSearch.indexOf(fields[1])!=-1) {
found.add(str);
System.out.println("ENDDDDDDDD value ");
in.close();
} catch (IOException e) {
System.out.println(e.toString());
Object[] foundResult = new Object[found.size()];
foundResult = found.toArray();
if (foundResult.length >= 0) {
System.out.println(foundResult.length);
return foundResult;
Hope that helps as it has confused me and am not sure why it is not returning a value.
Should I maybe use the contain method instead to search for the user inputted string?

Compare two strings and the save the greater

To devolop a vi,it can compare two strings.A string is gived,the other is saved previously.If greater,then save,or do nothing.

Hi,
I am assuming by "greater" you mean the string length.
Use the string length function from the strings palette, with shift-registers on a while loop. Write to the shift-register the "greater" string.
I am attaching a diagram screenshot for this. NOTE: depending on how you want this VI to run, you can move the input and output string control and indicator inside our outside the while loop.
Hope this is what you were looking for.
Khalid
Attachments:
strlen.gif ‏17 KB

How to compare two Objects !!!!

Hi All,
I know that this question has been asked 100 times till now. But trust me I have checked all of them but couldn`t find answer. Here is my question:
I have an objecs. In that object I am setting (Id,Name,DOJ). Now I want to check whether the object I am trying to save in database already exists or not. If exists then I need to check whether all the setters are same for the two objects. Now can anyone tell me ,how to compare two objects directly without comparing the setters individually.
Thanks in advance.

pavan13 wrote:
That is pretty good idea. However I have a query. Does that code actually compare all the setters in a two beans. I don`t want to check each setter seperately.Well, it's pretty meaningless to talk about "comparing setters", setters are methods, they don't have values to compare. Because equals is inside the class, you can simply compare the fields that get set by the setters. "Properties" is probably a better name.
In principal you could write something that tried to find all relevant fields and compare them, using reflection or bean info stuff. The resulting code would be about 50 times longer and take about 50 times longer to run. It's hardly asking a lot to put three comparisons between && operators.
Remember, though, not to compare string fields with ==, you should call .equals on the string fields.
p.s. don't let the bean terminology confuse you. Beans are just ordinary objects which follow a few rules. Personally I wish the term had never been coined.
Edited by: malcolmmc on Dec 6, 2007 4:15 PM

??how to compare two resultsets??

hi all!
i need to find out whether two resultsets contain the same data.
the only way i know how to do it in java is to put them into a while loop and fetch the contents first and then compare the contents.
but is there an easier way to compare resultsets?
does anyone know how to compare two resultsets without extracting the data?
the code example here executes two identical queries on an oracle database, compare and print the resultsets.
public ResultSet getResultset(String query)
ResultSet rs=null;
try { rs=Stmt.executeQuery(query); }
catch(Exception e) { e.printStackTrace(); }
return rs;
public static void main(String[] args) {
ResultSet r1=null;
ResultSet r2=null;
try {
database db = new ddatabase();
r1=db.getResultset("Select 'name' from person");
r2=db.getResultset("Select 'name' from person");
if (r1 == r2) {
System.out.println("ok");
System.out.print(r1);
System.out.println();
System.out.print(r2);
else {
System.out.println("not ok");
System.out.print(r1);
System.out.println();
System.out.print(r2);
jdbc.cleanup();
catch(Exception e) {e.printStackTrace();}
and here is the output:
F:\java rs_compare
not ok
oracle.jdbc.driver.OracleResultSetImpl@4413ee
oracle.jdbc.driver.OracleResultSetImpl@786e64
as you can see the resultsets are different though the data they contain have to be the same.
so the 'if(resultset#1 == resultset#2)' does not work.
thanks for any help
best regards
5ithl0rd

Don't cross-post.
I'll bet ResultSet implementations don't override equals() to provide "deep equals" behavior, in which case it'll be no different than using "==".
It's a bad idea to compare two ResultSets this way. You'll have to load both into objects or data structures and compare those in a "deep" way.
Besides, the ONLY way two ResultSets could be different, given the same query, would be if there were multiple clients that could write to the table between queries and change the underlying data. If your two queries are sufficiently isolated, I'd say that the same query will return the same ResultSet.
%

How to compare two dates that should not exceed morethan 3 years

hi all,
can you please tell me how to compare two dates( basically dates are string type)
that should not exceed more than 3 years? in JAVASCRIPT
Thanks in Advance.

This is not a JavaScript forum.
[*Google* JavaScript Forum|http://www.google.co.uk/search?q=JavaScript+Forum&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a]
Good luck.

How to Compare two strings in PL/SQL

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