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access_time 18 days ago

Extract sub string from a string is a common operation in data analytics. In Teradata, function SUBSTRING (SUBSTR) and REGEXP_SUBSTR are provided to achieve that. SUBSTR is used to extract string from a specified location while REGEXP_SUBSTR is used to extract string using regular expressions. ...

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local_offer teradata local_offer SQL

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access_time 18 days ago

COALESCE function in Teradata returns NULL if all arguments evaluate to null; otherwise it returns the value of the first non-null argument. NULLIF is to used evaluate two expressions and returns NULL if the two arguments are equal otherwise if returns the first arguments. IS NULL i...

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local_offer teradata local_offer SQL

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access_time 18 days ago

In SQL Server, TRY_CAST function returns a value cast to a specified data type is the cast is successful or null is the cast is not successful.  In Teradata, the equivalent function is TRYCAST. Code snippets -- return int 1030 SELECT TRYCAST('01030' AS int); -- retur...

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local_offer teradata local_offer SQL

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access_time 18 days ago

From Teradata 16, LEAD and LAG OLAP functions are supported. The LAG function returns data from a row preceding the current row at a specified offset in a window group; the LEAD function accesses data from a row following the current row at a specified offset in a window group. Scenario ...

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local_offer teradata local_offer SQL

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access_time 18 days ago

In ANSI SQL, you can use DATEADD function to easily add or subtract days/week/months/years from a date as the following code snippet shows: SELECT DATEADD ( ...

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local_offer teradata local_offer SQL

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access_time 18 days ago

In Teradata, Common Table Expression (CTE) is supported as other databases. You can create recursive CTE or use a reference of a CTE to another CTE. However there is a slight differences compared with other databases - The referenced CTE must be present after the referencing CTE. For exampl...

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local_offer teradata local_offer SQL

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access_time 5 months ago

This code snippet shows how to convert string to date in Teradata.

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local_offer teradata local_offer SQL

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access_time 5 months ago

In different databases, the syntax of selecting top N records are slightly different. They may also differ from ISO standards.

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access_time 5 months ago

In different databases, the syntax of selecting top N records are slightly different. They may also differ from ISO standards.

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local_offer teradata local_offer SQL

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access_time 5 months ago

This code snippet shows how to calculate time differences.

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