mysql- sql-mode 數據庫大小查詢
Mysql ---查看數據庫和表大小
查看mysql數據庫大小的四種辦法,分別有以下四種:
第一種:進去指定schema 數據庫(存放了其他的數據庫的信息)
use information_schema
第二種:查詢所有數據的數據文件和索引文件 大小
select concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as data_size from information_schema.TABLES;
select concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as data_size,
CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),‘MB‘) AS index_size
from information_schema.TABLES;
第三種:查看指定數據庫的數據文件和索引文件 的大小,比如說:數據庫test
select concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as data_size,
CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),‘MB‘) AS index_size
from information_schema.TABLES where table_schema=‘test‘;
第四種:查看指定數據庫的表的數據文件和作引文件 大小,比如說:數據庫test 中am21表
select concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as data_size,
CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),‘MB‘) AS index_size
from information_schema.TABLES where table_schema=‘test‘ and table_name=‘am21‘;
綜合查詢在 5.7不適用 是因為sql_mode未設置
SELECT TABLE_SCHEMA, CONCAT(TRUNCATE(SUM(data_length)/1024/1024,2),‘ MB‘) AS data_size,
CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),‘MB‘) AS index_size
FROM information_schema.tables;
GROUP BY TABLE_SCHEMA
ORDER BY data_length DESC;
報錯如下
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘GROUP BY TABLE_SCHEMA
ORDER BY data_length DESC‘ at line 1
解決辦法--- echo "sql_mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"" >> /etc/my.cnf 重啟mysql,再次執行
查看sql_mode
mysql -uroot -psunfuzhou -e "SHOW VARIABLES LIKE ‘SQL_MODE‘;"
設置sql_mode
臨時設置sql_mode
mysql -uroot -psunfuzhou -e "SET sql_mode=‘NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION ‘"
全局設置sql_mode
mysql -uroot -psunfuzhou -e "SET global sql_mode=‘NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION ‘"
SET @@GLOBAL.sql_mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION";
SELECT TABLE_SCHEMA, CONCAT(TRUNCATE(SUM(data_length)/1024/1024,2),‘ MB‘) AS data_size,
CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),‘MB‘) AS index_size
FROM information_schema.tables;
GROUP BY TABLE_SCHEMA
ORDER BY data_length DESC;
本文出自 “linux運維” 博客,請務必保留此出處http://sunfuzhou.blog.51cto.com/8603214/1969687
mysql- sql-mode 數據庫大小查詢