I am currently using SQL developer to look through a table in a database that has many columns. It would be ideal if in the single record view to have the column names sorted? I have been unable to find any option to achieve this.
EDIT
The single record view occurs in a couple of places. This includes selecting a table in the list and then selecting the data tab. Then right click on a record.
This does not require writing any SQL.
The single record view is sorted:
SELECT COLUMN_NAME, COLUMN_ID
FROM user_tab_columns
WHERE table_name = 'YOUR_TABLE'
ORDER BY COLUMN_ID;
It is just sorted by the COLUMN_ID which corresponds to the order in which the columns were defined in the DDL statement(s) that created the table.
It is not sorted alphabetically (which is what you are probably after) - but you can get it sorted alphabetically if you order the columns alphabetically in the original DDL statement or by renaming the columns (to something else and then back to the original name and recreating indexes).
Related
I know that ROWID is distinct for each row in different tables.But,I am seeing somewhere that two tables are being merged using rowid.So,I also tried to see it,but I am getting the blank output.
I have person table which looks as:
scrowid is the column which contains rowid as:
alter table ot.person
add scrowid VARCHAR2(200) PRIMARY KEY;
I populated this person table as:
insert into ot.person(id,name,age,scrowid)
select id,name, age,a.rowid from ot.per a;
After this I also created another table ot.temp_person by same steps.Both table has same table structure and datatypes.So, i wanted to see them using inner join and I tried them as:
select * from ot.person p inner join ot.temp_person tp ON p.scrowid=tp.scrowid
I got my output as empty table:
Is there is any possible way I can merge two tables using rowid? Or I have forgotten some steps?If there is any way to join these two tables using rowid then suggest me.
Define scrowid as datatype ROWID or UROWID then it may work.
However, in general the ROWID may change at any time unless you lock the record, so it would be a poor key to join your tables.
I think perhaps you misunderstood the merging of two tables via rowid, unless what you actually saw was a Union, Cross Join, or Full Outer Join. Any attempt to match rowid, requardless of you define it, doomed to fail. This results from it being an internal definition. Rowid in not just a data type it is an internal structure (That is an older version of description but Oracle doesn't link documentation versions.) Those fields are basically:
- The data object number of the object
- The data block in the datafile in which the row resides
- The position of the row in the data block (first row is 0)
- The datafile in which the row resides (first file is 1). The file
number is relative to the tablespace.
So while it's possible for different tables to have the same rowid, it would be exteremly unlikely. Thus making an inner join on them always return null.
Just want to know is this possible.
Say that if i have value 'X' and iam sure that this is referenced in some other tables as PK value but not sure about exactly which table is that, so i would like to know the list of those tables.
Pseudo query of above what i mentioned
SELECT TABLE_NAME FROM DBA_TABLES WHERE <<ATLEAST ONE OF THE TABLE ROW PK VALUE IS MATCHING EQUAL TO 'X'>>;
How to compare table data structure.
1. Any table added or deleted.
2. Any column in the tables added or deleted.
So my job is to verify if any table or columns are added/deleted on 1st of every month.
My plan is to run a sql query and take a copy of entire list of tables and it's data type only (NO DATA) and save it in txt file or something and use it as base line, and next month run the same sql query and get the results and compare the file. is it possible? please help with the sql query which can do this job.
This query will give you a list of all tables and their columns for a given user (just replace ABCD in this query for the user you have to audit and providing you have access to all that users tables this will work).
SELECT table_name,
column_name
FROM all_tab_columns
WHERE owner = 'ABCD'
ORDER
BY table_name,
column_id;
This answers your question but I have to agree with a_horse_with_no_name that is not a good way implement change control, most notably because the changes have already happened.
This query is very basic and doesn't give you all the information you'd need to see if a column has changed (or any information about other objects types etc), but then you only asked about additions and deletions of tables and columns and you can compare the output of this script to previous outputs to find the answer to your allotted task.
I have two tables like bellow shows figures
I need to select records as bellow shown figure. with AH_ID need to join in second table and ATT_ID will be the column header and ATT_DTL_STR_VALUE need to get as that column relevant value
Required output
Sounds like you have an Entity-Attribute-Value data model which relational DBs aren't the best at modeling. You may want to look into a key-value store.
However, as Justin suggested, if you're using 11g you can use th pivot clause as follows:
SELECT *
FROM (
SELECT T1.AH_ID, T1.AH_DESCRIPTION, T2.ATT_ID, T2.ATT_DTL_STR_VALUE
FROM T1
LEFT OUTER JOIN T2 ON T1.AH_ID = T2.AH_ID
)
PIVOT (MAX(ATT_DTL_STR_VALUE) FOR (ATT_ID) IN (1));
This statement requires you to hard-code in ATT_ID however there are ways to do it dynamically. More info can be found here.
Everywhere I look I can find how to update a table from data in another table but I am not looking for that. I have two tables TABLE1 and TABLE2. TABLE1 has a column PULLDATE and a column JOBNMBR. TABLE2 has a column JOBNMBR and a column PROJECT. The two tables link at the JOBNMBR column. I need to do a bulk update to TABLE1.PULLDATE per a project number, but that project number is stored in TABLE2.PROJECT.
Using VisualStudio 2005 and in VB code not C+, does anyone know the code (if there is any) that links the tables and allows me to update all TABLE1.PULLDATE records grouped by TABLE2.PROJECT? I will be providing the trigger to update using a textbox [TxtBox_Pulldate] and a nearby button [Button_UpdatePulldate].
Thanks a bunch
Chuck Vensel
I think I understand that you want to update Table1 given a matching column in Table2?
You write the SQL update just as you would the SELECT except replace the SELECT clause with the UPDATE clause.
UPDATE Table1
SET
[PULLDATE] = your_value
FROM
Table1
JOIN Table2
ON Table2.[JOBNMBR] = Table1.[JOBNMBR]
WHERE
Table2.[PROJECT] = your_project_ID