diff --git a/run_airline_ontime_data_mysql_to_ch_migration.sh b/run_airline_ontime_data_mysql_to_ch_migration.sh
new file mode 100755
index 0000000..fb29296
--- /dev/null
+++ b/run_airline_ontime_data_mysql_to_ch_migration.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+# migrate data from MySQL to ClickHouse
+
+# put csv files in this dir
+CSV_FILES_DIR="/var/lib/mysql-files"
+
+# dump CSV files into CSV_FILES_DIR
+sudo mysqldump \
+    -u root \
+    --tz-utc \
+    --quick \
+    --fields-terminated-by=, \
+    --fields-optionally-enclosed-by=\" \
+    --fields-escaped-by=\\ \
+    --tab="$CSV_FILES_DIR"/ \
+    airline ontime
+
+# replay CSV files from CSV_FILES_DIR
+sudo cat "$CSV_FILES_DIR"/ontime.txt | clickhouse-client --query="INSERT INTO airline.ontime FORMAT CSV"
diff --git a/src/tablebuilder.py b/src/tablebuilder.py
index 4db7d90..f32990a 100644
--- a/src/tablebuilder.py
+++ b/src/tablebuilder.py
@@ -264,19 +264,19 @@ def map_type(self, mysql_type, nullable=False):
             ch_type = 'String'
         elif mysql_type.startswith('TINYINT'):
             ch_type = 'UInt8' if mysql_type.endswith('UNSIGNED') else 'Int8'
-        elif mysql_type.startswith('BOOL') or mysql_type.startswith('BOOLEAN'):
+        elif mysql_type.startswith('BOOLEAN') or mysql_type.startswith('BOOL'):
             ch_type = 'UInt8'
         elif mysql_type.startswith('SMALLINT'):
             ch_type = 'UInt16' if mysql_type.endswith('UNSIGNED') else 'Int16'
         elif mysql_type.startswith('MEDIUMINT'):
             ch_type = 'UInt32' if mysql_type.endswith('UNSIGNED') else 'Int32'
-        elif mysql_type.startswith('INT') or mysql_type.startswith('INTEGER'):
+        elif mysql_type.startswith('INTEGER') or mysql_type.startswith('INT'):
             ch_type = 'UInt32' if mysql_type.endswith('UNSIGNED') else 'Int32'
         elif mysql_type.startswith('BIGINT'):
             ch_type = 'UInt64' if mysql_type.endswith('UNSIGNED') else 'Int64'
         elif mysql_type.startswith('SERIAL'):
             ch_type = 'UInt64'
-        elif mysql_type.startswith('DEC') or mysql_type.startswith('DECIMAL') or mysql_type.startswith('FIXED') or mysql_type.startswith('NUMERIC'):
+        elif mysql_type.startswith('DECIMAL') or mysql_type.startswith('DEC') or mysql_type.startswith('FIXED') or mysql_type.startswith('NUMERIC'):
             ch_type = 'String'
         elif mysql_type.startswith('FLOAT'):
             ch_type = 'Float32'
@@ -284,10 +284,10 @@ def map_type(self, mysql_type, nullable=False):
             ch_type = 'Float64'
 
         # Date and Time Types
-        elif mysql_type.startswith('DATE'):
-            ch_type = 'Date'
         elif mysql_type.startswith('DATETIME'):
             ch_type = 'DateTime'
+        elif mysql_type.startswith('DATE'):
+            ch_type = 'Date'
         elif mysql_type.startswith('TIMESTAMP'):
             ch_type = 'DateTime'
         elif mysql_type.startswith('TIME'):