SELECT *,
CASE SUBSTRING(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression), PATINDEX('%[0-9]%', RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression))))
WHEN '<=' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) <= CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) THEN 'True'
ELSE 'False' END
WHEN '=<' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) <= CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) THEN 'True'
ELSE 'False' END
WHEN '>=' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) >= CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) THEN 'True'
ELSE 'False' END
WHEN '=>' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) >= CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) THEN 'True'
ELSE 'False' END
WHEN '>' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) > CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) ) AS INT) THEN 'True'
ELSE 'False' END
WHEN '<' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) < CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) ) AS INT) THEN 'True'
ELSE 'False' END
WHEN '=' THEN
CASE WHEN CAST(LEFT(SlabExpression, PATINDEX('%[<,=,>]%', SlabExpression) -1) AS INT) = CAST(RIGHT(SlabExpression, LEN(SlabExpression) - PATINDEX('%[<,=,>]%', SlabExpression) ) AS INT) THEN 'True'
ELSE 'False' END
ELSE null
END AS Value
FROM #TEMP