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Teradata Cast BIGINT to String

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Teradata BIGINT data type represents a signed, binary integer value from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. To convert BIGINT to VARCHAR data type, CAST function can be used directly. 

CAST BIGINT to VARCHAR

SEL CAST(-9223372036854775808 AS VARCHAR(100))

Result: 

-9223372036854775808.

1 -9223372036854775808.

Remove trailing dot

Function TRIM can be used to remove the trailing dot from the above result:
SEL TRIM(trailing '.' from CAST(-9223372036854775808 AS VARCHAR(100)))
Result:
Trim(TRAILING '.' FROM -9223372036854775808.)
1 -9223372036854775808

Use TO_CHAR function

Alternatively, use TO_CHAR function directly:

SEL TO_CHAR(-9223372036854775808)
Result:
TO_CHAR(-9223372036854775808.)
1 -9223372036854775808
*Note - there is no trailing dot char when using TO_CHAR function.
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