How do I create a date condition in Teradata?
How do I create a date condition in Teradata?
General syntax: SELECT column FROM table WHERE date_column BETWEEN date1 AND date2….The below code is with DATE literal which the formal syntax of date types.
- SELECT name, dob.
- FROM employee.
- WHERE dob BETWEEN DATE ‘1998-03-01’
- AND DATE ‘1999-03-01’
- ORDER BY dob ;
How can I tell when a table was last updated in Teradata?
To find the time the table last was updated, you can try to parse query log table. For example, let your table name is TNAME and it is located in schema SNAME.
How do I create a table in Teradata?
Following is the generic syntax of CREATE TABLE statement. CREATE TABLE
Where are unused tables in Teradata?
Find unused tables in Teradata
- Select DatabaseName,TableName from dbc. tablesv.
- where DatabaseName = ‘Banking_prod_db’
- and LastAccessTimeStamp <= CURRENT_DATE -90;
What is Dbqlogtbl in Teradata?
The Teradata DBQL Tables Saves one row per query with the aggregated key figures like the number of CPU seconds, number of IOs, and much more. All SQL text is stored here in the common record for table DBC. DBQLOGTBL.
What is set and multiset tables in Teradata?
Set Versus Multiset Teradata classifies the tables as SET or MULTISET tables based on how the duplicate records are handled. A table defined as SET table doesn’t store the duplicate records, whereas the MULTISET table can store duplicate records. CREATE TABLE command is used to create tables in Teradata.
What is checksum in Teradata table?
For more on Teradata CHECKSUM see documentation. As for the CHECKSUM purpose, it’s an additional (to file system) data integrity verification. The hash is calculated over data being written, and is written alongside it. On subsequent read hash is calculated from read data, and compared.
How do I create a volatile table in Teradata?
The first option is you have to create simple tables in the same database and drop them after use. The second option is you can create volatile tables whose data and definition are automatically dropped by the Teradata database after you logged off from the database and that will be the more smart way.
What are the top frequently asked Teradata interview questions and answers?
A list of top frequently asked Teradata Interview Questions and Answers are given below. 1) What is Teradata? What are some primary characteristics of Teradata? Teradata is an RDBMS ( Relational database management system) which is perfect to use with large-scale data warehousing application.
What are the different types of tables in Teradata?
There are four types of tables as per data storage in Teradata: These are the Default table types in Teradata. Some of its characteristics are as follows. As its name suggests these tables remains in the system until it is dropped. Data is stored in a stable space. The permanent table definition is stored in the data dictionary.
What are the advantages of Teradata queue?
However, it is widely considered as best for taking and storing the requests in a queue. It can help in storing a very large number of requests in a defined manner. The multiple sets of responses can easily be created after this and the users can save time and effort both. 4. Name any two common ETL tools that you can use in the Teradata?
