Questions tagged [oracle]
Oracle Database is a Multi-Model Database Management System created by Oracle Corporation. Do NOT use this tag for other products owned by Oracle, such as Java and MySQL.
oracle
152,197
questions
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2.5m
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How do I limit the number of rows returned by an Oracle query after ordering?
Is there a way to make an Oracle query behave like it contains a MySQL limit clause?
In MySQL, I can do this:
select *
from sometable
order by name
limit 20,10
to get the 21st to the 30th rows (skip ...
- 16.5k
1216
votes
26
answers
2.4m
views
Get list of all tables in Oracle?
How do I query an Oracle database to display the names of all tables in it?
- 15.8k
678
votes
36
answers
697k
views
Fetch the rows which have the Max value for a column for each distinct value of another column
Table:
UserId, Value, Date.
I want to get the UserId, Value for the max(Date) for each UserId. That is, the Value for each UserId that has the latest date.
How do I do this in SQL? (Preferably Oracle....
- 6,815
527
votes
18
answers
1.4m
views
How to create id with AUTO_INCREMENT on Oracle?
It appears that there is no concept of AUTO_INCREMENT in Oracle, up until and including version 11g.
How can I create a column that behaves like auto increment in Oracle 11g?
- 7,467
495
votes
34
answers
1.1m
views
How to select the nth row in a SQL database table?
I'm interested in learning some (ideally) database agnostic ways of selecting the nth row from a database table. It would also be interesting to see how this can be achieved using the native ...
- 20.5k
463
votes
11
answers
652k
views
Can a foreign key be NULL and/or duplicate?
Please clarify two things for me:
Can a Foreign key be NULL?
Can a Foreign key be duplicate?
As fair as I know, NULL shouldn't be used in foreign keys, but in some application of mine I'm able to ...
- 21.9k
458
votes
29
answers
818k
views
Is there a combination of "LIKE" and "IN" in SQL?
In SQL I (sadly) often have to use "LIKE" conditions due to databases that violate nearly every rule of normalization. I can't change that right now. But that's irrelevant to the question.
Further, I ...
- 15.7k
448
votes
9
answers
718k
views
How to generate an entity-relationship (ER) diagram using Oracle SQL Developer
I want to use Oracle SQL Developer to generate an ER diagram for my DB tables but I am new to Oracle and this tool.
What is the process for creating an ER diagram in SQL Developer?
- 4,581
440
votes
8
answers
785k
views
What is the difference between Views and Materialized Views in Oracle?
What is the difference between Views and Materialized Views in Oracle?
- 81.4k
419
votes
16
answers
681k
views
Oracle: If Table Exists
I'm writing some migration scripts for an Oracle database, and was hoping Oracle had something similar to MySQL's IF EXISTS construct.
Specifically, whenever I want to drop a table in MySQL, I do ...
- 165k
415
votes
13
answers
393k
views
Liquibase lock - reasons?
I get this when running a lot of liquibase-scripts against a Oracle-server. SomeComputer is me.
Waiting for changelog lock....
Waiting for changelog lock....
Waiting for changelog lock....
Waiting ...
- 5,794
389
votes
9
answers
869k
views
Best way to do multi-row insert in Oracle?
I'm looking for a good way to perform multi-row inserts into an Oracle 9 database. The following works in MySQL but doesn't seem to be supported in Oracle.
INSERT INTO TMP_DIM_EXCH_RT
(EXCH_WH_KEY, ...
- 5,221
380
votes
16
answers
1.1m
views
Update statement with inner join on Oracle
I have a query which works fine in MySQL, but when I run it on Oracle I get the following error:
SQL Error: ORA-00933: SQL command not properly ended
00933. 00000 - "SQL command not properly ...
- 4,217
360
votes
16
answers
296k
views
Difference between a user and a schema in Oracle?
What is the difference between a user and a schema in Oracle?
- 6,717
342
votes
11
answers
562k
views
Is there any boolean type in Oracle databases?
Is there any Boolean type in Oracle databases, similar to the BIT datatype in Ms SQL Server?
- 3,421