SQL & PL/SQL :: Check Existing Entries In Table
Apr 3, 2012
I am abolute new in PL SQL and I am working on following topic:
I have to check if an entry exists in a table.
- if it exists ...... do something
- if not ...... simply go on
I tried the following:
select Count(*)from products p
where p.productNbr = temp_Nbr
Group By t.produkt;
I fetched the result into a variable entries
if entries > 0 .....
MY problem is the following:
If there are entries (entries>0) --> it works
If there are no entries, entries is not 0 but 'no data found' --> crash
I cannot work with Exceptions because this all happens in a Loop which must go on in both cases!
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May 9, 2012
How can I modify the check constraint without dropping the already existing check constraint.
Example: alter table table_1 add constraint const_chk check (ATTRIBUTE7 in
('READ','UNREAD');
Want to add some TENTATIVE value for the already existing one. I could do that by dropping the constraint
ALTER TABLE table_1 DROP CONSTRAINT const_chk and modifying it later as
alter table table_1 add constraint const_chk check (ATTRIBUTE7 in
('READ','UNREAD','TENTATIVE');
Is it possible to do that with out dropping the constraint?
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Jan 28, 2010
hw can i check the refresh rate of existing Mview..
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Sep 8, 2008
In oracle 9i ........How to delete duplicate entries in a table ?
if suppose in a table named office, one or more entry(row) is repeated more then twice or minimum twice.
I need a query to delete the multiple entries ....
Note:
--->No constraints applied on the table.
--->No Primary Key
--->You cannot create any object....that is no view or a duplicate table can be created
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Jan 11, 2007
I'm trying to generate count of the number of entries in a table for each day.The problem is the date column is of datatype timestamp and looks like this "2006-12-30 18:42:03.0"
How would I generate a report of number of entries in the table for each date (I'm not intrested in the "time" only the "date" i.e YYYY-MM-DD)?
SELECT COUNT(*) FROM my_table_name
WHERE my_date_column LIKE '2006-12-30%'
GO
It returns zero rows ( and I kno there are rows in the table) I'm using Oracle 10g.
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Jun 2, 2011
I have a table :
Product
A
B
C
D
and I was wondering if there is a quick method of populating it with calendar data so it would look like the following:
Product Year Month
A 2008 Jan
A 2008 Feb
A 2008 Mar
A 2008 Apr
A 2008 May
A 2008 Jun
A 2008 Jul
A 2008 Aug
A 2008 Sep
A 2008 Oct
A 2008 Nov
A 2008 Dec
A 2009 Jan
A 2009 Feb
Etc.
This would be done for all products for 4 years.
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Mar 28, 2013
I use APEX 4.2.0. In Tabular form, I have column of Select list type. This list has too many values and the end user must choose all these values along the tabular form rows. In other words, If the LOV consists of X, Y , Z, The End user should add three rows and choose a unique value for each row.
The problem is : This LOV is supposed to have too many values. What comes to mind is:
1- Whenever the end user picks a value, this value should disappear from the LOV of the second row ? But I have no clue how to do it?
OR
2- Whenever the end use picks a value, I should notify him/her about the remaining values that he should pick . But I have no clue how to do it ?
At the end the purpose is to make the user aware that he still has some rows to add ( values to choose ... )
I simplified the issue in simple example here:
[URL]......
workspace: somefeto
user: test
pwd: test
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Jan 4, 2009
I am creating a table from another existing table in another schema. The existing table contains data. When I am using the query- create table m _voucher as select * from ipm.m_voucher,I am getting the whole data of m_voucher but I want empty m_voucher table, so what will be the query to get the empty m_voucher table?
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Sep 2, 2010
I want to create temp table, for this i am using:
CODEcreate global temporary table help_temp
as
select * from help;
but this is creating only the table structure, not copying the table data.
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Jul 20, 2012
How to add ROWDEPENDENCIES in an existing table. I mean How to Alter any table to add ROWDEPENDENCIES..
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Nov 30, 2011
We have a transaction table and has 30 million rows. The table is not partitioned till date. We need to create partition on this table. We had an idea of moving this data to a temporary table and create partition[range]on the original table and move the data back.
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Apr 24, 2012
I want to either UPDATE or add a new column with ROWNUMBER() OVER an column on a table
the output will shows like below
empID DeptNo New_column Start_Date
11 7778 1 01-02-2010
11 3400 202-06-2010
25 4444 103-02-2010
25 7775 204-07-2011
25 7777 305-02-2012
30 2223 109-02-2012
the forth one column is in date format and I want to update table with respect to order by the column start_date
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Nov 15, 2010
I need to get the timestamp for all the existing records in my table...I am having one user definition field, is this possible?
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Apr 1, 2013
Can we modifying the existing constraint on table?I have table level UNIQUE constraint on 3 columns of table.I need to modify the UNIQUE constraint to 2 columns? Instead of dropping/recreating the constraint, is there any option to modify the existing constraint
Ex
CREATE TABLE TEST_CONST(NUM1 NUMBER , NUM2 NUMBER , NUM3 NUMBER , UNIQUE (NUM1 ,NUM2,NUM3)); ;
SELECT * FROM USER_CONS_COLUMNS UCC WHERE UCC.TABLE_NAME LIKE 'TEST_CONST';
ALTER TABLE TEST_CONST MODIFY CONSTRAINT SYS_C0025132 UNIQUE(NUM1,NUM2);
ORA-00933: SQL command not properly ended
Third statement is not executing fine .
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Feb 20, 2012
I have table property and flat , in both of these tables I have cvp_id common colomn .Now I want to add cluster on this colomn so how can I add cluster to table which is already exists.
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Aug 13, 2010
I need to create partition on the non partition table without dropping a table.
Range partition on stage tables and hash partition on fact tables.
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Oct 31, 2013
I have 2 tables that doesn't have primary keys. These 2 tables have same number of rows. I want to create a new table from getting some columns from table1 and some columns from table 2. I want to combine first row from table1 and first row from table2.
Below is example
TABLE1
ACOL1 ACOL2 ACOL3
A1 A2 A3
B1 B2 B3
C1 C2 C3
TABLE2
BCOL1 BCOL2 BCOL3
11 12 13
21 22 23
31 32 33
COMBINED_TABLE
ACOL1 BCOL2 BCOL3
A1 12 13
B1 22 23
C1 32 33
I tried below query but no luck. It gives below error:
Query : create table COMBINED_TABLE AS select a.ACOL1, b.BCOL2, b.BCOL3 from (select ACOL1,rownum from TABLE1) a, (select BCOL2, BCOL3, rownum from TABLE2) b WHERE a.rownum = b.rownum
Error : ORA-01747:"invalid user.table.column, table.column, or column specification"
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Apr 22, 2013
declare
vnum number;
vname varchar2(50):='t1';
begin
begin
select count(*) into vnum from dba_tables where table_name=vname;
dbms_output.put_line('table count '||vnum);
exception
when others then
vnum := 0;
end;
begin
if vnum>0 then
execute immediate 'drop table '||vname;
dbms_output.put_line('table dropped');
end if;
exception
when others then
dbms_output.put_line('table does not exists');
end;
execute immediate 'create table '||vname ||' ( n number)';
dbms_output.put_line('table created');
end;
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Aug 1, 2013
Im having table which is of 45M rows table [Not partitioned], Now I want to compress the old data other than last 3Months data, I should not go for partition compress. Rarely some select queries will be fired on that Old data. Now how can I compress that table without affecting the Indexes , Dependencies proc, pkgs, Functions.
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit ProductionPL/SQL Release 11.2.0.3.0 - Production"CORE 11.2.0.3.0 Production"
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Jul 30, 2011
I want to put one check box to check all the check boxes.how can i do this?
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Dec 8, 2012
I had created a new table named USERLOG with two fields from a previous VIEW. The table already consist of about 9000 records. The two fields taken from the VIEW, i.e. weblog_views consist of IP (consists of IP address), and WEB_LINK (consists of URL). This is the code I used,
CREATE TABLE USERLOG
AS
SELECT C_IP, WEB_LINK FROM weblog_views;
I want to add another column to this table called the USER_ID, which would consists of a sequence starting with 1 to 9000 records to create a unique id for each existing rows. I'm using Oracle SQL Developer: ODMiner version 3.0.04. I tried using the AUTO-INCREMENT option,
ALTER TABLE USERLOG
ADD USER_ID INT UNSIGNED NOT NULL AUTO_INCREMENT;
But I get an error with this,
Error report:
SQL Error: ORA-01735: invalid ALTER TABLE option
01735. 00000 - "invalid ALTER TABLE option"
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Jan 23, 2011
I recently started working with legacy code and noticed that some huge tables (5 years worth of data, don't have more details on me right now but can post later if needed) are partitioned based on time sequence number column while majority of queries are done based on time (different column). Queries performance is degrading and I'd like to try to modify partitioning and run some tests to evaluate performance improvement.
My only concern is with so much live data I have to come up with solution on how to switch partitioning with the least impact on applications running 24 x 7. Something you have done in the same situation and it worked?
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Dec 8, 2012
I had created a new table named USERLOG with two fields from a previous VIEW. The table already consist of about 9000 records. The two fields taken from the VIEW, i.e. weblog_views consist of IP (consists of IP address), and WEB_LINK (consists of URL). This is the code I used,
CREATE TABLE USERLOG
AS
SELECT C_IP, WEB_LINK FROM weblog_views;
I want to add another column to this table called the USER_ID, which would consists of a sequence starting with 1 to 9000 records to create a unique id for each existing rows. I'm using Oracle SQL Developer: ODMiner version 3.0.04.
I tried using the AUTO-INCREMENT option,
ALTER TABLE USERLOG
ADD USER_ID INT UNSIGNED NOT NULL AUTO_INCREMENT;
But I get an error with this,
Error report:
SQL Error: ORA-01735: invalid ALTER TABLE option 01735. 00000 - "invalid ALTER TABLE option"
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Sep 6, 2010
below query.
1) How to add a new column to the existing table's particular position, instead of atlast.
2) I created a table without mentioned the datatype size as below Create table dummy (name char, age number). Then what is the default size will be allocated for those column's?
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Nov 29, 2012
it's possible to compress the existing table in oracle database directly.
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Mar 18, 2013
I have granted select privs on below tables to an exisiting user.grant select on WEB.ALMSTAT to nms...I would like to view the privs that i have granted to nms user?
*"In production, nms user will need the ability to read the following tables:*
*WEB.ALMSTAT*
*NET.ASSET*
*NET.LOCATIONNAME"*
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Jan 28, 2013
I am trying to partition an existing table through DBMS_REDEFNITION. Following are the steps that I have taken and the error I have got.
1. Creating a table to be partitioned.
CREATE TABLE SO33070_ORIGINAL
(
SERIAL_ID NUMBER(15,0),
INSERTED_TIME DATE DEFAULT SYSDATE,
PRIMARY KEY (SERIAL_ID)
);
Success
2. Checking if the table can be partitioned
DECLARE
v_name VARCHAR2(256);
BEGIN
SELECT sys_context('userenv', 'current_user') INTO v_name FROM dual;
DBMS_REDEFINITION.CAN_REDEF_TABLE(v_name, 'SO33070_ORIGINAL', dbms_redefinition.CONS_USE_ROWID);
END;
Success
3. Creating a duplicate table
CREATE TABLE SO33070_NEW
(
SERIAL_ID NUMBER(15,0),
INSERTED_TIME DATE DEFAULT SYSDATE
)
PARTITION BY RANGE ("INSERTED_TIME") INTERVAL (NUMTODSINTERVAL(1,'DAY'))
(
PARTITION "p1_1" VALUES LESS THAN (TO_DATE(' 2012-01-01 00:00:00', 'SYYYY-MM-DD HH24:MI:SS', 'NLS_CALENDAR=GREGORIAN'))
)
Success
4. Starting the redefnition process
EXEC DBMS_REDEFINITION.START_REDEF_TABLE( uname => 'CDS_USER', orig_table => 'SO33070_ORIGINAL', int_table => 'SO33070_NEW', col_mapping => '', options_flag => DBMS_REDEFINITION.CONS_USE_ROWID);
Success
5. Copying the dependents
DECLARE
num_errors NUMBER;
BEGIN
DBMS_REDEFINITION.COPY_TABLE_DEPENDENTS(
uname => 'CDS_USER',
orig_table=>'SO33070_ORIGINAL',
[code]....
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Dec 19, 2011
I'm am getting an error that says that a role doesn't exist when I can cleary see it in DBA_ROLES. I can successfully grant other roles in this session. I am using Oracle 11.1 on RAC.
GRANT "CONNECT" TO BAKERD
Error at line 1
ORA-01919: role 'CONNECT' does not exist
select * from dba_roles where role = 'CONNECT'
[code]....
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May 8, 2013
how to convert existing table with varchar column to a clob
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May 18, 2011
i have one table emp in this table i have the column eno,ename,hiredate and i have data also in this table.
my eno colum data type is number so now i have to change this colum data type from number to varchar2.
if yes how can when i am trying to change this colum data type i got this error
Failed to commit: ORA-01439: column to be modified must be empty to change datatype.
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