How to compare strings

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• How to compare the original value of table size and the changed value

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• How to compare the content of two Wordpad / documents notebook without reading them line by line?

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• How to compare two dates and find exactly

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  }
  

  peardox Thanks for the reply

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• How to convert string input streams

  Can someone tell me how to convert string input streams...

  There are multiple ways. I will list down few of them.

  With the help of the old solution and standard java.
  

  publicstaticString fromStream(InputStream in)throwsIOException {    BufferedReader reader =newBufferedReader(newInputStreamReader(in));    StringBuilder out =newStringBuilder();    String line;    while((line = reader.readLine()) !=null) {        out.append(line);    }    returnout.toString(); } returnsb.toString();

  If you use Google-Collections/guava-

  InputStream stream = ... String content = CharStreams.toString(newInputStreamReader(stream, Charsets.UTF_8)); Closeables.closeQuietly(stream);

  If you use the common Apache library... then it is worthwhile.

  StringWriter writer =newStringWriter(); IOUtils.copy(inputStream, writer, encoding); String theString = writer.toString();

  Quick way but only work during deserialization.

  String result = (String)newObjectInputStream( inputStream ).readObject();

  Note: ObjectInputStream is on deserialization and the flow of data must respect the Protocol of serialization to work, which may not always true in all cases.

  Ultimately, the most effective solution and only in two lines using java class Scanner.

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  publicstaticString convertToString(InputStream in) {    java.util.Scanner s =newjava.util.Scanner(in).useDelimiter("\\A");             returns.hasNext() ? s.next() :""; }

  Read more: http://www.techartifact.com/blogs/2013/11/how-to-readconvert-an-inputstream-to-a-string.html#ixzz2lvy5muix

• How to compare premises, iSCSI and storage NFS for VMware ESXi 5 with IO Analyzer?

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  I have 2 hosts ESXi 5.0 with a few virtual machines running. I would compare the IO throughput for my local storage, iSCSI and NFS vmware storage store. Can someone point me to the right direction? I read the documents and tutorials, but I'm not sure how to compare tests from these 3 options.

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• How to compare two files to see the differences in the content?

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• How to compare two users (2)

  Hi all

  11.2.0.1

  AIX 6.1

  I have two databases (dev & uat) on separate servers with equal facility.

  On each database, I created a schema user "batchdba" and gave them same privilege "dba".

  But when I import (impdp) the dumpfile output from other databases that encrypted table and with the same command, it runs successfully on DEV but not on the UAT.

  How can I compare that privilege is missing from the UAT for the user "batchdba". Or how to compare the privileges granted to these two patterns?

  Thank you very much

  zxy

  You can query the following views on the databases to compare the result

  dba_tab_privs

  dba_role_privs

  dba_sys_privs

  query these tables with the status RECIPIENT = "BATHCDBA."

• How to split string separated by commas and pass to the clause of the select statement

  Referring to article How to divide string separated by commas, then pass to clause of a select statement, tquery that there the following plan:

  Query1:

  select * from emp where ename in (
      select regexp_substr('SMITH,ALLEN,WARD,JONES','[^,]+', 1, level) from dual
      connect by regexp_substr('SMITH,ALLEN,WARD,JONES', '[^,]+', 1, level) is not null );
  

  Base1:

  Plan hash value: 4242290184
  
  
  --------------------------------------------------------------------------------------------
  | Id  | Operation                       | Name     | Rows  | Bytes | Cost (%CPU)| Time     |
  --------------------------------------------------------------------------------------------
  |   0 | SELECT STATEMENT                |          |     1 |   133 |     7  (29)| 00:00:01 |
  |*  1 |  HASH JOIN                      |          |     1 |   133 |     7  (29)| 00:00:01 |
  |   2 |   VIEW                          | VW_NSO_1 |     1 |    46 |     3  (34)| 00:00:01 |
  |   3 |    HASH UNIQUE                  |          |     1 |       |     3  (34)| 00:00:01 |
  |*  4 |     CONNECT BY WITHOUT FILTERING|          |       |       |            |          |
  |   5 |      FAST DUAL                  |          |     1 |       |     2   (0)| 00:00:01 |
  |   6 |   TABLE ACCESS FULL             | EMP      |    14 |  1218 |     3   (0)| 00:00:01 |
  --------------------------------------------------------------------------------------------
  
  
  Predicate Information (identified by operation id):
  ---------------------------------------------------
  
  
     1 - access("ENAME"="$nso_col_1")
     4 - filter( REGEXP_SUBSTR ('SMITH,ALLEN,WARD,JONES','[^,]+',1,LEVEL) IS NOT NULL)
  

  However, the following query generates the plan I want:

  Query2:

  select * from emp where ename in ('SMITH','ALLEN','WARD','JONES');
  

  Plan2:

  Plan hash value: 3956160932
  
  
  --------------------------------------------------------------------------
  | Id  | Operation         | Name | Rows  | Bytes | Cost (%CPU)| Time     |
  --------------------------------------------------------------------------
  |   0 | SELECT STATEMENT  |      |     4 |   348 |     3   (0)| 00:00:01 |
  |*  1 |  TABLE ACCESS FULL| EMP  |     4 |   348 |     3   (0)| 00:00:01 |
  --------------------------------------------------------------------------
  
  
  Predicate Information (identified by operation id):
  ---------------------------------------------------
  
  
     1 - filter("ENAME"='ALLEN' OR "ENAME"='JONES' OR "ENAME"='SMITH' OR
                "ENAME"='WARD')
  

  Can I change the query1 query for plan2?

  As Juliet was mentioned in the first SQL that you generate from the ENAME list that you must pass in the IN clause when executing. But in the second SQL, it passed as a static value. So first SQL must do more work. So you see a different execution plan.

  But this is a work around to get what you are looking for. But I can't say it's a foolproof method. But anyway here you go.

  SQL > var ename_list varchar2 (100)
  SQL > exec: ename_list: = 'SMITH, ALLEN, WARD, JONES ';

  PL/SQL procedure successfully completed.

  SQL > select *.
  2 of PEM
  where the 3 «,» | : ename_list | ',' like '%', | Ename | ',%';

  EMPNO, ENAME, JOB HIREDATE DEPTNO ID COM SAL MGR
  ---------- ------ --------- ---------- --------- ---------- ---------- ---------- ----------
  7369 SMITH COMMITTED 7902 2975 2 APRIL 81 0 20
  7499 ALLEN 7698 1600 20 FEBRUARY SALESMAN 81 300 30
  7521 WARD 7698 1250 22 FEBRUARY SALESMAN 81 500 30
  7566 JONES MANAGER 7839 2975 2 APRIL 81 0 20

  SQL > select * from table (dbms_xplan.display_cursor);

  PLAN_TABLE_OUTPUT
  -------------------------------------------------------------------------------------------------------
  SQL_ID, 848zhvbvgf7d6, number of children 0
  -------------------------------------
  Select * from emp where «,» | : ename_list | ',' like '%', | Ename
  || ',%'

  Hash value of plan: 2872589290

  --------------------------------------------------------------------------
  | ID | Operation | Name | Lines | Bytes | Cost (% CPU). Time |
  --------------------------------------------------------------------------
  |   0 | SELECT STATEMENT |      |       |       |     2 (100) |          |
  |*  1 |  TABLE ACCESS FULL | EMP |     1.    38.     2 (0) | 00:00:01 |
  --------------------------------------------------------------------------

  Information of predicates (identified by the operation identity card):
  ---------------------------------------------------

  1 - filter(','||:ENAME_LIST||',' LIKE '%,'||") ENAME "|", %')

  19 selected lines.

  SQL >

• How to compare the new values with the old values in triggers.

  Dear all,
  
  Please tell me how to compare the new values with the old values in triggers.

  Hi, the employee example is in the document. You'd better read yourself.

  CREATE OR REPLACE TRIGGER Print_salary_changes
    BEFORE DELETE OR INSERT OR UPDATE ON Emp_tab
    FOR EACH ROW
  WHEN (new.Empno > 0)
  DECLARE
      sal_diff number;
  BEGIN
      sal_diff  := :new.sal  - :old.sal;
      dbms_output.put('Old salary: ' || :old.sal);
      dbms_output.put('  New salary: ' || :new.sal);
      dbms_output.put_line('  Difference ' || sal_diff);
  END;
  /