Teradata Package for Python Function Reference on VantageCloud Lake - array_lt - Teradata Package for Python - Look here for syntax, methods and examples for the functions included in the Teradata Package for Python.
Teradata® Package for Python Function Reference on VantageCloud Lake
- Deployment
- VantageCloud
- Edition
- Lake
- Product
- Teradata Package for Python
- Release Number
- 20.00.00.11
- Published
- August 2026
- ft:locale
- en-US
- ft:lastEdition
- 2026-08-13
- dita:id
- TeradataPython_FxRef_Lake_2000
- Product Category
- Teradata Vantage
- teradataml.dataframe.sql.DataFrameColumn.array_lt = array_lt(self, other, lower_bound=None, upper_bound=None)
- DESCRIPTION:
Compare the elements of the array with another array or scalar value and
return a boolean result for each comparison if value in the array is less than
the other value.
PARAMETERS:
other:
Required Argument.
Specifies the array or Python literal value to compare against.
Note:
* Value specified in "other" must be of the same type as the array to compare.
Types: ColumnExpression OR Python literal
lower_bound:
Optional Argument.
Specifies the starting index for comparison (inclusive).
Note:
* If specified, both "lower_bound" and "upper_bound" arguments must be provided.
Types: int
upper_bound:
Optional Argument.
Specifies the ending index for comparison (inclusive).
Note:
* If specified, both "lower_bound" and "upper_bound" arguments must be provided.
Types: int
RETURNS:
ColumnExpression
EXAMPLES:
>>> from teradataml import *
>>> load_example_data("array", "array_table")
# Create a DataFrame on 'array_table'.
>>> df = DataFrame("array_table")
>>> df
arr1 arr2 arr3
id
1 (10,20,30,40,50) (23,200,215,40,21) ('ab','bc','cd','ab','ef')
4 (180,28,38,48,58) (30,NULL,NULL,250,27) ('mn','no',NULL,'op','pq')
2 (150,25,35,45,55) (28,50,95,90,26) ('xy','yz','za','ab','xy')
6 (16,261,36,46,56) (29,170,160,46,25) ('uv','xy','ab','xy','yz')
3 (12,22,320,42,52) (25,22,140,200,23) ('pq','ab','ab','st','tu')
5 (14,24,34,44,54) (26,NULL,NULL,180,24) ('ij','jk',NULL,'kl','lm')
# Example 1: Compare if elements in array column 'arr1' are less than the corresponding
# elements in array column 'arr2'.
>>> res = df.assign(lt_res = df.arr1.array_lt(df.arr2))
>>> res
arr1 arr2 arr3 lt_res
id
1 (10,20,30,40,50) (23,200,215,40,21) ('ab','bc','cd','ab','ef') (1,1,1,0,0)
4 (180,28,38,48,58) (30,NULL,NULL,250,27) ('mn','no',NULL,'op','pq') (0,NULL,NULL,1,0)
2 (150,25,35,45,55) (28,50,95,90,26) ('xy','yz','za','ab','xy') (0,1,1,1,0)
6 (16,261,36,46,56) (29,170,160,46,25) ('uv','xy','ab','xy','yz') (1,0,1,0,0)
3 (12,22,320,42,52) (25,22,140,200,23) ('pq','ab','ab','st','tu') (1,0,0,1,0)
5 (14,24,34,44,54) (26,NULL,NULL,180,24) ('ij','jk',NULL,'kl','ab') (1,NULL,NULL,1,0)
# Example 2: Compare if elements in array column 'arr1' are less than a scalar value 25.
>>> res = df.assign(lt_res = df.arr1.array_lt(25))
>>> res
arr1 arr2 arr3 lt_res
id
1 (10,20,30,40,50) (23,200,215,40,21) ('ab','bc','cd','ab','ef') (1,1,0,0,0)
4 (180,28,38,48,58) (30,NULL,NULL,250,27) ('mn','no',NULL,'op','pq') (0,0,0,0,0)
2 (150,25,35,45,55) (28,50,95,90,26) ('xy','yz','za','ab','xy') (0,0,0,0,0)
6 (16,261,36,46,56) (29,170,160,46,25) ('uv','xy','ab','xy','yz') (1,0,0,0,0)
3 (12,22,320,42,52) (25,22,140,200,23) ('pq','ab','ab','st','tu') (1,1,0,0,0)
5 (14,24,34,44,54) (26,NULL,NULL,180,24) ('ij','jk',NULL,'kl','ab') (1,1,0,0,0)
# Example 3: Compare the elements present in second position to fourth position in the array
# column 'arr1'. Check whether they are less than the scalar value 25 or not.
>>> res = df.assign(lt_res = df.arr1.array_lt(25, lower_bound=2, upper_bound=4))
>>> res
arr1 arr2 arr3 lt_res
id
1 (10,20,30,40,50) (23,200,215,40,21) ('ab','bc','cd','ab','ef') (NULL,1,0,0,NULL)
4 (180,28,38,48,58) (30,NULL,NULL,250,27) ('mn','no',NULL,'op','pq') (NULL,0,0,0,NULL)
2 (150,25,35,45,55) (28,50,95,90,26) ('xy','yz','za','ab','xy') (NULL,0,0,0,NULL)
6 (16,261,36,46,56) (29,170,160,46,25) ('uv','xy','ab','xy','yz') (NULL,0,0,0,NULL)
3 (12,22,320,42,52) (25,22,140,200,23) ('pq','ab','ab','st','tu') (NULL,1,0,0,NULL)
5 (14,24,34,44,54) (26,NULL,NULL,180,24) ('ij','jk',NULL,'kl','ab') (NULL,1,0,0,NULL)
# Example 4: Compare if elements in array column 'arr1' are less than the corresponding
# elements in array column 'arr2' present in third position to fifth position.
>>> res = df.assign(lt_res = df.arr1.array_lt(df.arr2, lower_bound=3, upper_bound=5))
>>> res
arr1 arr2 arr3 lt_res
id
1 (10,20,30,40,50) (23,200,215,40,21) ('ab','bc','cd','ab','ef') (NULL,NULL,1,0,0)
4 (180,28,38,48,58) (30,NULL,NULL,250,27) ('mn','no',NULL,'op','pq') (NULL,NULL,NULL,1,0)
2 (150,25,35,45,55) (28,50,95,90,26) ('xy','yz','za','ab','xy') (NULL,NULL,1,1,0)
6 (16,261,36,46,56) (29,170,160,46,25) ('uv','xy','ab','xy','yz') (NULL,NULL,1,0,0)
3 (12,22,320,42,52) (25,22,140,200,23) ('pq','ab','ab','st','tu') (NULL,NULL,0,1,0)
5 (14,24,34,44,54) (26,NULL,NULL,180,24) ('ij','jk',NULL,'kl','ab') (NULL,NULL,NULL,1,0)