What is Teradata DBC?

Teradata Database Administration This user is called DBC, and from it all other future databases and users in the system are created. Because all space ultimately comes from user DBC, user DBC owns all database objects. User DBC contains data like a database, but unlike a database it has a password.

Herein, what is DBC table Teradata?

Teradata data dictionary tables are metadata tables present in the DBC database. It can be used for variety of things such as checking table size, query bottleneck and database size etc. Dbc. Columns : Column informatiom of tables, views, join index & hash index etc.

One may also ask, how do I get column names in Teradata? To get all the column names used in database in Teradata

1. select columnname from dbc. columns.
2. where tablename ='tbl'
3. and databasename = 'database'

Likewise, how does Teradata calculate row size?

Procedure To Determine the Exact Row Size for Aligned Row Systems

1. Set the initial value for RowSize to 12 bytes and the initial value for 64-Bit_Byte_Alignment_Bit_Overhead to 0 bytes.
2. Record the number of columns compressed on a non-null value.
3. Record the number of nullable columns.

How do I backup a Teradata table?

CREATE TABLE active_employees AS ( SELECT * FROM employee e WHERE e.active_flg = 'Y' ) WITH DATA;

1. Create a full copy of an existing table.
2. Create a new copy of a table that contains only some of the original records - a subset.
3. Create an empty table but with exactly the same structure of the original.

How do I list all tables in Teradata?

Teradata SQL Assistant for Microsoft Windows User Guide Select Tools > List Tables. On the toolbar click . 2 In the Database Name field, type the name of the database (or owner, if using Oracle) containing the tables.

How would you describe a view in Teradata?

To see the view definition just use the SHOW command. Syntax: SHOW VIEW VIEW_NAME; Now if the view is built on several views and it is taking multiple SHOW commands to identify and reach to base tables then use below query to see all the underlying VIEW definitions.

What is schema in Teradata?

Teradata PT requires that the job script describe the structure of the data to be processed, that is the columns in table rows or fields in file records. This description is called the schema. Schemas are created using the DEFINE SCHEMA statement. You can use the same schema for multiple operators.

How do I view tables in Teradata SQL Assistant?

Teradata SQL Assistant for Microsoft Windows User Guide

1. Do one of the following: Select Tools > List Columns.
2. In Database Name field, type the name of the database (or owner, if using Oracle) containing the table or view.
3. In Table or View Name, type the name of the table or view.

How does Teradata calculate table size?

To find the Table Space Size of your table across all AMPs in

1. SELECT DATABASENAME, TABLENAME, SUM(CURRENTPERM)
2. FROM DBC. TABLESIZE.
3. WHERE DATABASENAME = '<database>' AND TABLENAME = '<table>'
4. GROUP BY DATABASENAME , TABLENAME;

How do I find a particular column name in all tables?

To get full information: column name, table name as well as schema of the table.. USE YourDatabseName GO SELECT t.name AS table_name, SCHEMA_NAME(schema_id) AS schema_name, c.name AS column_name FROM sys. tables AS t INNER JOIN sys. columns c ON t.

How do I get a list of all columns of a table in SQL?

Keyboard shortcut for the above command: select table name (i.e highlight it) and press ALT + F1 . You can try this. This gives all the column names with their respective data types. It will check whether the given the table is Base Table.