How do you write a case statement in Teradata?
CASE Statement in Teradata
- SELECT column1,
- CASE column2.
- WHEN value1 THEN result1.
- WHEN value2 THEN result2.
- END.
- FROM table.
How do you qualify in Teradata?
Qualify and Row number in Teradata We can use row number with qualify function to extract the required results. The Row number function ordered the marks with row number. In order to get the highest marks in each subject, we are using the Qualify function to take the the record that has row number as 1.
Can we use CASE statement in where clause Teradata?
To expand on the excellent answer, you can’t combine case and where in . You’d have to use dynamic sql for that, which macros don’t support, I don’t think. So you have to use this or logic.
Is Teradata case sensitive?
Teradata by default is case insensitive. Whatever value you compare in the WHERE clause it does not match the exact case of that value.
What does coalesce mean in Teradata?
COALESCE is a statement that returns the first non-null value of the expression. It returns NULL if all the arguments of the expression evaluates to NULL.
What is qualify ROW_NUMBER () over?
Qualify basically tells the database to apply the analytical function (e.g: sum(),max(),min(),avg(),row_number(),rank() etc..) over the number of rows specified insider the over() clause.
Is null Teradata SQL?
For example, the expression NULL = NULL has no meaning and therefore can never be true. A query that specifies the predicate WHERE NULL = NULL is not valid because it can never be true….Teradata Database SQL Fundamentals.
| Value of First Column in Index | Value of Second Column in Index |
|---|---|
| null | 1 |
| null | null |
How do I make Teradata case sensitive?
When in BTET mode we can enforce case specific comparisons by making use of ‘CASESPECIFIC’ attribute to the column in parenthesis following the column name.
What is Character Set Latin in Teradata?
The Teradata LATIN server character set is an extension of the R2 international character set. This extension is designed to provide support for the ISO 8859-1 (Latin1) and ISO 8859-15 (Latin9) repertoires.