Columns of inst_table:
Array
(
    [id] => int(11) NOT NULL AUTO_INCREMENT
    [year] => int(11) NOT NULL
    [month] => int(11) NOT NULL
    [inst_type] => varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [inst_name] => varchar(60) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [inst_amount] => int(11) NOT NULL DEFAULT 0
    [inst_addon] => varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [addon_amount] => int(11) NOT NULL DEFAULT 0
    [subtotal] => int(11) NOT NULL DEFAULT 0
    [total] => int(11) NOT NULL DEFAULT 0
    [flat_type] => varchar(40) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [project] => varchar(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [comments] => varchar(255) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [full_date] => varchar(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [yr_mon] => int(11) NOT NULL DEFAULT 0
    [flat_num] => varchar(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [bldg_no] => varchar(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [area] => varchar(20) CHARACTER SET utf8 COLLATE utf8_unicode_ci DEFAULT NULL
    [sess] => int(11) NOT NULL DEFAULT 1
)
Analysis Complete. Script generated at production_update.sql