Is there a simple query that will let me distinguish Cloud SQL from stock PostgreSQL? Maybe something like select version() or select current_setting('server_version')?
(I don't have access to a Cloud SQL instance to experiment.)
For the most part, things are the same. You could try looking for the CLOUDSQLSUPERUSER role, which wouldn't existing on regular postgres (unless you or someone else has added it).
EDIT: added #enocom's suggestions for a query to do this:
select * from pg_catalog.pg_user where usename = 'cloudsqlsuperuser';
Related
I've just installed the vscode extension (Oracle Developer Tools for VS Code (SQL and PLSQL)
) and successfully connected the db.
The db resides on AWS.
I can connect the db and just wanted to test it by opening an existing view.
But, it just lets me "describe" the view. So I can see the columns but I need to edit the query statement.
What's missing? Or is the problem the AWS part?
I usually use SQL Developer but I'm furthermore interested in backing up the work via git commits. And I like the way "git graph" extensions presents the changes.
DDL view_name
Or
SELECT
text_vc
FROM
dba_views
WHERE
owner = :schema AND
view_name = :view_name;
With help from someone of the Oracle community I managed to get it working.
Basic query is:
select
dbms_metadata.get_ddl('VIEW', 'VIEW_NAME', 'VIEW_OWNER')
from
dual;
So, in my case it is:
select
dbms_metadata.get_ddl('VIEW', 'ALL_DATA_WAREHOUSE_BOSTON', 'WHB')
from
dual;
Owner is the name you fill in when connection to the database, which is the key/value pair (username/password).
If you are not sure who the owner of the view is, check it with this query:
select owner from ALL_VIEWS where VIEW_NAME ='ALL_DATA_WAREHOUSE_BOSTON';
Currently I'm working on a simple library project using Embarcadero C++Builder 10.3 Community Edition, and Firebird and FlameRobin to create databases.
So far, I need only use simple queries, that were connected to a single database. Therefore, I used TFDConnection and TFDPhysFbDriverLink to connect to a .fdb file. Then, TFDQuery to create SQL commands and TDataSource. It works great.
Unfortunately, now I must join two tables. How do I write this command? I tried this:
SELECT * FROM users_books
join books on
users_books.id_book = books.id
where users_books and books are databases.
I got an error:
SQL error code = -204
Table unknown
BOOKS.
So I think I must connect somehow to these two databases simultaneously. How to do that?
Firebird databases are isolated and don't know about other databases. As a result, it is not possible to join tables across databases with a normal select statement.
What you can do, is use PSQL (Procedural SQL), for example in an EXECUTE BLOCK. You can then use FOR EXECUTE STATEMENT ... ON EXTERNAL to loop over the table in the other database, and then 'manually' join the local table using FOR SELECT (or vice versa).
For example (assuming a table user_books in the remote database, and a table books in the current database):
execute block
returns (book_id integer, book_title varchar(100), username varchar(50))
as
begin
for execute statement 'select book_id, username from user_books'
on external 'users_books' /* may need AS USER and PASSWORD clause as well */
into book_id, username do
begin
for select book_title from books where id = :book_id
into book_title do
begin
suspend;
end
end
end
With Oracle, the syntax is:
explain plan for
select * from users WHERE user_name = :user_name AND user_dob = :user_dob
Is it possible to do the same in DB2? The statement below does not seem to work.
explain plan with snapshot for
select * from users WHERE user_name = :user_name AND user_dob = :user_dob
Thank you.
The answer may depend on your DB2 version and platform, which you chose not to share with us for some reason. This works fine on DB2 for LUW (v10.1, but I'm sure it would work with v9.7 and up):
$ db2 "explain plan with snapshot for select * from syscat.schemata where schemaname = :blah"
DB20000I The SQL command completed successfully.
You may want to try replacing named parameter markers with questions marks.
Apparently, the answer is in the IBM website, but it is not easy to make sense of.
http://publib.boulder.ibm.com/infocenter/db2luw/v9/index.jsp?topic=%2Fcom.ibm.db2.udb.admin.doc%2Fdoc%2Fr0000952.htm
FOR explainable-sql-statement
Specifies the SQL statement to be explained. This statement can be any
valid CALL, Compound SQL (Dynamic), DELETE, INSERT, MERGE, SELECT,
SELECT INTO, UPDATE, VALUES, or VALUES INTO SQL statement. If the
EXPLAIN statement is embedded in a program, the
explainable-sql-statement can contain references to host variables
(these variables must be defined in the program). Similarly, if
EXPLAIN is being dynamically prepared, the explainable-sql-statement
can contain parameter markers.
But it does not tell you what "parameter markers" are, so you have to go and search for it.
In SQL I can write 2 separate SELECT statements and execute them at the same time, such as:
SELECT * FROM Table_Name
SELECT * FROM Another_Table
Is it possible to do this in PostgreSQL?
It sounds to me like you're really asking a PGAdmin question. In SQL Server's query analyzer / Enterprise Manager if you execute two select statements, two result sets will be displayed in the output area.
PGAdmin doesn't do this; you need two separate query windows to see both result sets. I know of no other free GUI admin tool for PostgreSQL. Maybe someone else will.
EDIT:
I've recently started using Squirrel-SQL and DBeaver. Either of these may be more what you're looking for. I prefer DBeaver myself.
Brian
oracle has 'DESCRIBE' to get all the details of the table like wise does t/sql has any thing.
SQL Server has sp_help/sp_helptext
MySQL has describe
Sql-Server's sp_help is about as close as you get for something built-in. Remeber to put the tablename in as a parameter...:-)
EXEC sp_help 'mytable'
If you're in ssms, you can r-click your query window and opt to output results to text -- it's a little easier to read the output.
ms-help://MS.SQLCC.v10/MS.SQLSVR.v10.en/s10de_6tsql/html/913cd5d4-39a3-4a4b-a926-75ed32878884.htm
Also -- you can write your own using the system tables (sys.objects, sys.columns, ...) I think 'DESCRIBE' just gives you column name, nullable, and type... so not nearly as much as sp_help provides.
SELECT * FROM sysobjects WHERE parent_obj = (SELECT id FROM sysobjects WHERE name = 'table_name') AND xtype='PK'
will show table details.
SELECT * FROM sys.Tables
will list all tables
There is no describe equivalent.
you might find this searching for MSSQL instead of T/SQL. Most people talking about Transact SQL are talking about stored procedures.