Data Definition Language; defining database structures but not their contents.

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2
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1answer
691 views

What means Command column in sp_who2 and text column in sys.dm_exec_sql_text?

I have a script that shows commands being fired in SQL Server 2008 database as follows: --shows who is active and executed commands declare @SPID int=null, @Status varchar(max) = null, @LOGIN ...
2
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2answers
432 views

Error on DDL statement never invokes CATCH

When I try to close the SS Management Studio window below is the error I understand that DDL statements are implicit COMMIT and the below WARNING message is because BEGIN TRAN never COMMIT or ...
2
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0answers
227 views

Cannot drop a Postgres table

I want to drop a few tables in my postgresql database. I am able to drop a few tables but there are 3 tables which I am unable to drop. I need to drop a few tables in my Postgres DB. I tried the ...
0
votes
1answer
249 views

Migration script fires 'The data definition language (DDL) command cannot be executed at the Subscriber'

Yesterday I had run a migration script, produced by Visual Studio 2008 schema compare option, on a SQL Server 2008 database. It had run correctly. But today, when I executed the same script, it threw ...
1
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0answers
55 views

SQL Server Comparison

I am merging two different versions of a database. I want to add some specific fields from source database to destination, so I used Visual Studio to do that. It does the job quite well but only table ...
0
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1answer
28 views

Ensuring that 1 row has 5 specific records referencing it

Context: a TEST has many CASEs. Typical. However, the catch is that a TEST instance must have exactly 5 instances of CASE (1 to 5). I could do something like this: create table TEST ( ID ...
1
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1answer
50 views

What's wrong with my DDL statement? [closed]

I am trying to run: CREATE TABLE `members` ( `id` int(11) NOT NULL auto_increment, `users` text NOT NULL, `password` text NOT NULL, `ip` text NOT NULL, `status`text NOT NULL, UNIQUE KEY `id` (`id`) ) ...
2
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2answers
576 views

exporting DDL of all views Oracle

How can I go about exporting DDL of all my schema views in single .sql file ? I've read there is a function DBMS_METADATA.GET_DDL But I can't figure out how to use it for my case. I know how to ...
4
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4answers
9k views

Query to compare the structure of two tables in MySQL

To automate the backup process of one of my MySQL databases, I would like to compare the structure of two tables (current version vs old version). Can you think of a query that can compare two ...
1
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1answer
1k views

Check constraint references another column in same table

I have this table but check constraint is throwing me an error: Column CHECK constraint for column 'MedicamentRegulated' references another column, table 'Medicaments'. I've seen this as allowed ...
1
vote
1answer
59 views

Change column without interrupting service

We need to change the data type of a column in a large table (~1.7 GiB) from VARCHAR(1024) to VARCHAR(512) in order to be able to create a secondary index over two columns. We're using MySQL 5.6 with ...
5
votes
1answer
245 views

Why does dropping a MVIEW trigger a full refresh?

I just created a materialized view in Oracle but realized I used the wrong script, so I wanted to drop the MVIEW again. The MVIEW was created with a statement like this: create materialized view ...
0
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2answers
295 views

Modifying a part (one procedure) in oracle database package

Is it possible to modify an individual procedure inside an Oracle DB Package? instead of recreating (modification is not done using a SQL editor, so cannot modify a place and easily recompile the ...
2
votes
1answer
405 views

LOCK=NONE when adding NOT NULL constraint fails with “cannot silently convert NULL values” error despite no NULL values being present

I'm trying to use MySQL's online DDL feature to add a NOT NULL constraint to an InnoDB table without blocking writes to the table. According to manual, this should be possible - the linked table ...
1
vote
1answer
172 views

Can I run DDL in pretend mode in Oracle

I have a script to drop several objects in the database (including queues) -- when it partially fails I need to recreate the objects that have already been dropped to continue testing the script. For ...
3
votes
1answer
1k views

Script to automate converting a clustered index on primary key (with foreign keys to it) column to non clustered?

What's a good way to easily convert a clustered index on a primary key column to a nonclustered index? I know how to do this manually, but it's time consuming if there are several tables which have ...
1
vote
1answer
263 views

Import using pgAdmin3 produces ERROR: duplicate key value violates unique constraint

I am importing from the GUI a CSV file into a table. I have created the following table: CREATE TABLE jira_tickets.daqa_rpt_tbl ( daqa_report_id bigint NOT NULL DEFAULT ...
2
votes
2answers
467 views

What is the advantage of using numeric primary keys in a relational database?

Many tables in a relational database system (in my admittedly limited experience) have this sort of structure (Oracle syntax as that's what I'm used to): create table widgets ( widget_id number ...
0
votes
1answer
4k views

Using EXECUTE IMMEDIATE inside PL\SQL Block

Using EXECUTE IMMEDIATE inside PL\SQL block makes the whole block commit immediately. begin INSERT INTO Customer ( GUID, STATUS, NAME) VALUES (1,1,'xx'); EXECUTE IMMEDIATE 'CREATE TABLE Shop ( ...
3
votes
1answer
505 views

What happens when you create the primary key of a table on a different filegroup?

Creating a table on a different filegroup is absolutely no problem when using Sql Server. create table common.test ( id int, CONSTRAINT [pk_test] PRIMARY KEY CLUSTERED (id ASC) ON ...
5
votes
1answer
1k views

Permissions to see and script objects, but not alter them?

I am a software developer. I have a production database that I need full ddl read access to, but not any ddl write or execute access. Is there a script I can send my DBA that will grant me full ddl ...
1
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1answer
2k views

How to generate create table script without primary and foreign key in Oracle

I have lots of schemas and tables. I want to generate create script of all of my tables. I am using below statement and it is working pretty well. SELECT ...
0
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0answers
49 views

Organizing a couple tables in postgresql

I have a data structure that is represented like this: { 'question_id': 1, 'is_required': False, 'question_text': [ { 'id': 1, ...
1
vote
1answer
115 views

What's the complexity of renaming a column in MySql?

We want to rename a column in our MySql (version 5.5) database with something like this: ALTER TABLE t1 CHANGE a b INTEGER; Is this an O(N) (N=number of rows in the table) or an O(1) operation? I ...
2
votes
1answer
214 views

Does a DDL in Oracle affect other transactions?

I understand that DDL statements in Oracle have an implicit commit before and after the statement, which obviously affects the current transaction. However, does a DDL statement in any way affect ...
3
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1answer
618 views

Has postgresql a fast add column optimization?

When adding not-null columns with a default value - does Postgresql optimizes this operation? In case the table has n rows, a not-optimized alter-table-add-column would yield n writes of the default ...
-2
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1answer
65 views

What objects can be affected in SQL Server 2012 by a DDL statement [closed]

Are they any objects that could be CREATEd, ALTERed, or DROPped in SQL Server 2012 other than the following list: Tables Stored procedures Views Functions Triggers Indexes P.S. I'm only interested ...
4
votes
1answer
648 views

Online Schema migration in MySQL : When to start?

I'm the tech lead of a Social Media SAAS, where we're currently experiencing a big increase in data amount we're storing in our mySQL-database. We're having a single MySQL db, and besides many ...
11
votes
1answer
4k views

MATCH FULL vs MATCH SIMPLE in foreign key constraints

I've noticed a MATCH SIMPLE or MATCH FULL option in phpPgAdmin, but I can't find a description in the docs. The default is MATCH SIMPLE. How do they function?
1
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1answer
67 views

Understanding the output of \d <table> in psql

Say I run the following command: \d mtb.big_table I get the output shown below. My questions are: What are column modifiers? (what does default now() mean?) Under Indexes, Why do some indices ...
2
votes
1answer
471 views

How to access external DLL's static methods that incorporate output parameters in SQL Server

I know how to load a CLR DLL in SQL Server and access to its static methods which does not incorporate output parameters in their method signatures but what I cannot realize is how I can use methods ...
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0answers
1k views

DDL trigger AFTER ALTER ON SCHEMA behavior

Can anyone please tell me what's going on here: CREATE TRIGGER afr_alt_trig AFTER ALTER ON SCHEMA cols ora_name_list_t; BEGIN IF (ora_dict_obj_type = 'TABLE') THEN select column_name bulk ...
0
votes
1answer
36 views

Conditional when creating a domain

How can I define or change a domain based on another attribute value? F.e. domain for salary is a numeric value > 500. But if a date the person was hired > January 1st, 2013, then the salary must be ...
2
votes
2answers
182 views

Is this an example of an Enum (Enumerated Type)

I'm looking at a code base that I have inherited. I'm new to Postgres (but have an Oracle background), and I think this in one of the queries is an example of an enum. Can someone confirm if I'm ...
18
votes
2answers
10k views

Best way to populate a new column in a large table?

We have a 2.2 GB table in Postgres with 7,801,611 rows in it. We are adding a uuid/guid column to it and I am wondering what the best way to populate that column is (as we want to add a NOT NULL ...
1
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1answer
2k views

Server Wide DDL Trigger Permissions Issue

I am trying to implement a server wide DDL Trigger that will audit the DDL changes across the databases on the server using script very similar to the article found here The trigger will log the DDL ...
5
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2answers
2k views

Postgres DDL and DML best practices and coding standards [closed]

Is there a best practice or coding/design conventions for Postgres both DDL and DML/SQL that you could share and recommend. I am looking for something similar to what Google has for programming. ...
4
votes
1answer
14k views

Changing a column data type from datetime to float

I have a table with a float column. All values in this column for all records are NULL. I want to change the data type to datetime. I executed the query: ALTER TABLE MyTable ALTER Column MyColumn ...
4
votes
2answers
3k views

SQL Server Replication: “ALTER TABLE ALTER COLUMN” is not propagated to subscribers

We are running SQL Server 2008 R2 SP1 as publisher & distributor, and SQL Server 2005 SP3 as subscriber. The replication of schema changes is activated, and the replication has been running for ...
1
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1answer
4k views

create database table with a owner in my SQL

Can someone tell me what is the SQL command to create a table with specific owner?
4
votes
2answers
15k views

Why can't we write ddl statement directly into the PL/SQL block

Why can't we write ddl statements directly in PL/SQL block, for example when i write CREATE OR REPLACE PROCEDURE test IS BEGIN truncate table table_name; // error END test; / But, CREATE OR ...
8
votes
2answers
5k views

Why is truncate DDL?

I have an interview question, which was asked during my interview. I answered the question, but interviewer was not so convinced with my answer. So, anyone please correct me with my understanding ? ...
1
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0answers
184 views

Replication issue - CREATE SELECT alternative?

I've an MySQL 5.1 slave for our BI team. They need to make some CREATE SELECT with big select queries (several million lines). As CREATE SELECT is a DDL, if the replication attempts to update some ...
6
votes
1answer
6k views

How to determine the collation of a table in PostgreSQL?

I want to script a check of the collations used on my tables in PostgreSQL, but googling for Postgresql detect collation is not working well for me, and the documentation is not making this an easy ...
4
votes
3answers
3k views

Rollback group of DDL statements

Working in SQL Server 2008 R2, I am trying to rollback a set of DDL statements as a group (think of an upgrade script for a database), but am running into trouble. Take the following code: begin try ...
4
votes
1answer
6k views

How to create a partitioned table based on date?

I'm trying to create a partitioned table where partitioning is determined by OrderDate. I'm trying to create a clustered index on OrderDate and a nonclustered primary key on OrderID. But I get an ...
6
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1answer
635 views

ERWIN create and use database

I'm trying to generate physical database from my logical model using ERWIN 7. All is well in the script that is generated automatically, there is only the problem that the model is created in the ...
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1answer
473 views

Upgrade production database during software development lifecycle

Background Using Oracle, there are a number of tools that help with migrating and applying development changes into the production environment (such as Embarcadero Change Manager). These tools can be ...
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1answer
100 views

Is there a way to create a re-usable base table definition in InfoSphere Data Architect?

Our company has chose to use IBM's InfoSphere Data Architect (IDA) for data architecting regarding our data warehouse and data marts. The data architects originally designed several "re-usable" ...
6
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2answers
4k views

Column definition for a SQL Server equivalent to Access BOOLEAN type

The BOOLEAN datatype in Access (ie, Jet/ACE) returns a -1 for True and 0 for False; the field is always required (i.e., it cannot be set to NULL). The SQL Server BIT type returns 1 for True and 0 for ...