import arcpy
from arcpy.analysis import *

#Define input/output
input = arcpy.GetParameterAsText(0)
fieldName = arcpy.GetParameterAsText(1)
values = arcpy.GetParameterAsText(2)
output = arcpy.GetParameterAsText(3)

#Build the where clause
queryJoin = "' OR " + fieldName + " = '"
whereClause = fieldName + " = '" + queryJoin.join(values) + "'"

Select(input, output, whereClause)

# Import system modules
import arcpy
from arcpy import env

# Set the workspace
env.workspace = arcpy.GetParameterAsText(0)
Dir = env.workspace

# Local variables
input = arcpy.GetParameterAsText(1)
polygon = arcpy.GetParameterAsText(2)
expression = arcpy.GetParameterAsText(3)
name = arcpy.GetParameterAsText(4)

# Make a layer from the input feature class
arcpy.MakeFeatureLayer_management(input, "lyr")

# Select all points or polygons which overlap the polygon/s of interest
arcpy.SelectLayerByLocation_management("lyr", "intersect", polygon, 0, "new_selection")

# Within selected features, further select based on a SQL query within the script tool
arcpy.SelectLayerByAttribute_management("lyr", "SUBSET_SELECTION", expression)

# Write the selected features to a new featureclass
arcpy.CopyFeatures_management("lyr", Dir + "\" + str(name))

def whereClause(table, field, values):
    """Takes a semicolon-delimited list of values and constructs a SQL WHERE
    clause to select those values within a given field and table."""

# Add field delimiters
fieldDelimited = arcpy.AddFieldDelimiters(arcpy.Describe(table).path, field)

# Split multivalue at semicolons and strip quotes
valueList = [value[1:-1]
             if (value.startswith("'") and value.endswith("'"))
             else value for value in values.split(';')]

# Determine field type
fieldType = arcpy.ListFields(table, field)[0].type

# Add single-quotes for string field values
if str(fieldType) == 'String':
    valueList = ["'%s'" % value for value in valueList]

# Format WHERE clause in the form of an IN statement
whereClause = "%s IN(%s)" % (fieldDelimited, ', '.join(valueList))a
return whereClause

# Add field delimiters
fieldDelimited = arcpy.AddFieldDelimiters(arcpy.Describe(table).path, field)

# Split multivalue at semicolons and strip quotes
valueList = [value[1:-1]
             if (value.startswith("'") and value.endswith("'"))
             else value for value in values.split(';')]

# Determine field type
fieldType = arcpy.ListFields(table, field)[0].type

# Add single-quotes for string field values
if str(fieldType) == 'String':
    valueList = ["'%s'" % value for value in valueList]

# Format WHERE clause in the form of an IN statement
whereClause = "%s IN(%s)" % (fieldDelimited, ', '.join(valueList))a
return whereClause