使用shell脚本生成数据库markdown文档

学习shell脚本编程的一次实践，通过shell脚本生成数据库的markdown文档，代码如下：

 HOST=xxxxxx
 PORT=xxxx
 USER="xxxxx"
 PASSWORD="xxxxxx"
 DATABASE_PREFIX="xxxxxx"

 QUERY_DATABASE="select distinct TABLE_SCHEMA from information_schema.TABLES where TABLE_TYPE='BASE TABLE'"
 databaseList=$(mysql -h ${HOST} -u ${USER} -p${PASSWORD} -e "${QUERY_DATABASE}")

 for database in ${databaseList}
 do
     if [[ ${database} == *${DATABASE_PREFIX}* ]]
     then
         echo "Start ${database}"
		 echo "### ${database}" >> test.md
         queryTable="select  distinct TABLE_NAME from information_schema.COLUMNS where TABLE_SCHEMA='${database}'"
         tableList=$(mysql -h ${HOST} -u ${USER} -p${PASSWORD} -N -e "${queryTable}")
         for table in ${tableList}
         do

			 if [ $(grep -c "#### ${table%_*}_0" test.md) -ne '0' ]
			 then
				 continue
			 fi

             echo "Start print table:${table}"
			 echo "#### ${table}" >> test.md
             echo "名称 | 类型 | 是否可为空 | Key | 说明" >> test.md
			 echo "--|--|--|--|--" >> test.md
			 queryCloumns="select COLUMN_NAME, replace(COLUMN_TYPE,' ',''),IS_NULLABLE,CONCAT(COLUMN_KEY,'+++++++++'),CONCAT(replace(COLUMN_COMMENT,' ',''),'+++++++++') from information_schema.COLUMNS where TABLE_NAME='${table}' and TABLE_SCHEMA='${database}' order by ORDINAL_POSITION"

             columnList=$(mysql -h ${HOST} -u ${USER} -p${PASSWORD} -N -e "${queryCloumns}")
             count=0
			 row=""
              for column in ${columnList}
              do
				  row="${row} ${column} | "

                  let count++
				  if [[ ${count} == 5 ]]
				  then
					  echo ${row} >> test.md
					  count=0
					  row=""
				  fi
              done
          done

      fi
  done