What to know list of metadata tables details in snowflake.
in oracle we have user_tables..etc
like oracle what to know metadata table in snowflake.
Eg: select *From user_tables
where table_name='EMP';
Metadata is stored in
Information Schema:
The Snowflake Information Schema (aka “Data Dictionary”) consists of a set of system-defined views and table functions that provide extensive metadata information about the objects created in your account.
SELECT *
FROM INFROMATION_SCHEMA.TABLES
WHERE TABLE_NAME = 'EMP';
Related
is there a way to load all databases from the source SQL Server to the data lake as it is?
I tried to load each database with his tables but I am asking if there was a way to load all databases as it is to the data lake
One of the ways to load all databases from SQL to ADLG2 is by using Azure Data Factory
Follow the below procedure to load all databases from SQL to ADLG2:
First create one pipeline and take script activity in it add linked service with master database select script as Query And give the following query:
SELECT name, database_id, create_date
FROM sys.databases;
Then take ForEach activity and int its settings give Items as so it will fetch output of script activity
#activity('Script1').output.resultSets[0].rows
In for each activity take one lookup activity, create and add linked service for database with dynamic values
In that dataset add Db name parameter
Noe send this parameter value to linked service properties as below
Lookup activity settings
SELECT table_Schema, TABLE_NAME, TABLE_CATALOG
FROM information_Schema.tables
WHERE TABLE_TYPE = 'BASE TABLE'sql
now take execute pipeline activity click on new in that pipeline create lookupOP parameter with array datatype and in execute pipeline pass the value to it as output of lookup as #activity('Lookup1').output.value
In that new pipeline take ForEach activity and passthe parameter we created as items
In that for each activity take one copy activity and for the source dataset create linked service on SQL database with dynamic values as we created previously
In this dataset create parameters for database name, table name and schema name
now add these dynamic values to linked service properties and Table name, table schema
Copy activity source setting:
create parameters in sink dataset
now add these dynamic values to folder name, file name
Copy activity Sink settings
Output
creating folder of database name and in that folder loading tables of that particular database
Hi i am trying to find the names of the database by specfying the name of the schema in snowflake
Easiest way is to query the account usage view called SCHEMATA in the SNOWFLAKE database.
SELECT * FROM snowflake.account_usage.schemata WHERE schema_name = 'NAME-HERE';
I hope this helps...Rich
I have a SQL database (lets use northwind), that has a number of tables (unknown number of tables). I would like to import these tables into a MS access database as DATA (not tables) into a MTT_Table
All standard imports, creates the table as a physical table within ms access and not as data.
I have a table in MS Access that needs to store all the names of tables in other systems - not sure if that makes sense
Is there any way to read an infinite number of tables and populate them as data, using an odbc connection all through VBA
Expected output would be to see the table names as data values, and potentially able to populate the MS access row with metadata about the table
Use information schema to create a view in SQL server:
CREATE VIEW dbo.Sample_View
AS
SELECT TABLE_NAME
FROM [Your_Database].INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
Now import this view to access following the steps in this link
Your question is a bit broad (what information do you want from tables), but generally can be achieved by querying the INFORMATION_SCHEMA meta-tables over ODBC.
SELECT * INTO MTT_Table
FROM [ODBC;Driver={SQL Server};Server=my\server;Database=myDb;Trusted_Connection=Yes;].INFORMATION_SCHEMA.TABLES
I understand that we can do "show databases" in snowflake to get the details of databases. But is there any admin table which i can query.
Actually in my result set I need only database names.
There is an option to use RESULT_SCAN but i am trying to avoid the same.
please advise.
You can use INFORMATION_SCHEMA , and in particularINFORMATION_SCHEMA.DATABASES`, e.g.
SELECT * FROM INFORMATION_SCHEMA.DATABASES
Server-scoped Dynamic Management View are stored only in the Master database.
SELECT name, type, type_desc
FROM sys.system_objects
WHERE name LIKE 'dm%'
ORDER BY name
How to list Database-Scoped DM Views and where it stored?
Can you advise?
Server-scoped Dynamic Management View are stored only in the Master
database.
Not exactly. DMVs are stored in the internal mssqlsystemresource database but are visible in all databases. You should get the same results if you run your query from any database, assuming you're not limited by permissions.
Database-scoped DMVs generally have prefix 'dm_db_' and can be listed with the query below.
SELECT name, type, type_desc
FROM sys.system_objects
WHERE name LIKE N'dm%[_]db[_]%'
ORDER BY name;