Error: Table "mysql"."innodb_table_stats" not found.2013-04-02 09:07:35 7fc53f5e4700 InnoDB: Recalculation of persistent statistics requested for table "mydatabase"."mytable" but the required persistent statistics storage is not present or is corrupted. Using transient stats instead.How to resolve???Read this mysql doc to learn more about Persistent Statistics.(http://dev.mysql.com/doc/refman/5.6/...
背景描述# Time: 2019-01-24T00:08:14.705724+08:00
# User@Host: **[**] @ [**] Id: **
# Schema: sentrymeta Last_errno: 0 Killed: 0
# Query_time: 0.315758 Lock_time: 0.001693 Rows_sent: 9664 Rows_examined: 36413 Rows_affected: 0
# Bytes_sent: 1616970 Tmp_tables: 1 Tmp_disk_tables: 1 Tmp_table_sizes: 16384
# QC_Hit: No Full_scan: No Full_join: No Tmp_table: Yes Tmp_table_on_disk: Yes
# F...
MySQL中You can‘t specify target table for update in FROM clause错误的意思是说,不能先select出同一表中的某些值,再update这个表(在同一语句中)。 例如下面这个sql:update tms_jyxx_mx
set gg_dm =‘1004‘where jyxx_id
in (SELECTt1.jyxx_id as jyxx_idFROMtms_jyxx t1,tms_jyxx_mx t2WHEREt1.sjmc =‘保定白沟新城铭磊加油站‘AND t1.jyxx_id = t2.jyxx_idAND t2.ljqh =‘14‘AND t2.jysj >=‘2019-04-30 10:17:22‘AN...
-- MySQL 5.7 CLUSTER NDB 7.5 -- 创建undo logfile groupcreate logfile group lg_1 ADD UNDOFILE ‘undo_1.log‘ INITIAL_SIZE 1024M undo_buffer_size 8M ENGINE NDBCLUSTER; -- 增加 logfileALTER logfile group lg_1 ADD UNDOFILE ‘undo_2.log‘ initial_size 1024M ENGINE NDBCLUSTER; -- 创建tablespaceCREATE TABLESPACE ts1 ADD DATAFILE ‘data...
MySQL 列,可选择的数据类型(通过sql命令查看:help create table;) BIT[(length)]| TINYINT[(length)] [UNSIGNED] [ZEROFILL]| SMALLINT[(length)] [UNSIGNED] [ZEROFILL]| MEDIUMINT[(length)] [UNSIGNED] [ZEROFILL]| INT[(length)] [UNSIGNED] [ZEROFILL]| INTEGER[(length)] [UNSIGNED] [ZEROFILL]| BIGINT[(length)] [UNSIGNED] [ZEROFILL]| REAL[(length,decimals)] [UNSIGNED] [ZEROFILL]| DOUBLE[(length,decimals)]...
SELECTcount(*) from (SELECT province_code as area_id, count(*) from t_cas_rural_selected GROUPBY province_code
UNIONallSELECT city_code as area_id, COUNT(*) from t_cas_rural_selected GROUPBY city_code
UNIONallSELECT county_code as area_id, COUNT(*) from t_cas_rural_selected GROUPBY county_code)
as tTotal如上,后面加个 as tablename 就可以了,例如:"as tTotal"mysql union出错: "Every derived table m...
mysql中You can‘t specify target table for update in FROM clause错误的意思是说,不能先select出同一表中的某些值,再update这个表(在同一语句中)。 例:DELETE from sys_org_relation where pOrgid in (select porgId from sys_org_relation r where r.corgid=‘客户id‘ and relationType=1112) and and relationType=1213;该语句中要操作的sys_org_relation 表条件也是来自sys_org_relation 表查询的结果,此时会抛出...
今天服务器当机了,重启后就发现了如下错误:Table ‘./mysql/proc’ is marked as crashed and should be repaired解决方法:repair table mysql.proc;原文:http://www.cnblogs.com/littlehb/p/4573356.html
1. 获取所有表结构(TABLES)SELECT * FROM information_schema.TABLES WHERE TABLE_SCHEMA=‘数据库名‘; TABLES表:提供了关于数据库中的表的信息(包括视图)。详细表述了某个表属于哪个schema,表类型,表引擎,创建时间等信息。各字段说明如下: 字段含义table_catalog数据表登记目录table_schema数据表所属的数据库名table_name表名称table_type表类型[system view|base table]engine使用的数据库引擎[MyISAM|CSV|InnoDB]ve...
登录数据库后,选择数据库时发现以下提示,mysql> use testReading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> 意思是 预读这个库中表以及表列信息,一般原因是当库中表很多,表中数据很大时,就会出现执行use <库名>后半天没反应,连接很慢的情况,解决办法就是 -A 方式登录数据库,不会预读库中表信息。shell> mysql...
查看information_schema.tables:DESC information_schema.TABLES
TABLE_SCHEMA ---->库名
TABLE_NAME ---->表名
ENGINE ---->引擎
TABLE_ROWS ---->表的行数
AVG_ROW_LENGTH ---->表中行的平均行(字节)
INDEX_LENGTH ---->索引的占用空间大小(字节)使用案例:查询整个数据库中所有库和所对应的表信息:SELECT table_schema,GROUP_CONCAT(table_name)
FROM information_schema.tables
GROUP BY tab...
1. show databases mysql> show databases;+--------------------+| Database |+--------------------+| information_schema || mysql || performance_schema || test |+--------------------+4 rows in set (0.00 sec) 2. use database_namemysql> use testDatabase changed 3. show tables mysql> show tables;+----------------+| Tables_in_test |+----------------+| user ...
MySQL数据库插入数据出现ERROR 1526 (HY000): Table has no partition for value xxx工作的时候发现无法插入数据,报错:ERROR 1526 (HY000): Table has no partition for value xxx根据字面意思可以猜测大概是值已经超出了分区的范围,查询表结构发现此表创建了分区,并且设定了规则是按照ID范围存储数据,当插入的数据最后的分区ID值要大时,报错。解决方法可以直接添加分区即可。为验证问题,创建表:/************************...
Q: How do I see what the character set that a MySQL database, table and column
are in? Is there something like SHOW CHARACTER SETFOR mydatabase; and SHOW CHARACTER SETFOR mydatabase.mytable; and SHOW CHARACTER SETFOR mydatabase.mytable.mycolumn;A:How do I see what the character set that a MySQL database, table and column
are in? Is there something likeSHOW CHARACTER SETFOR mydatabase;andSHOW CHA...
一.mysql 执行select 的时候报Table错误:is marked as crashed and last (automatic?)解决方法如下:找到mysql的安装目录的bin/myisamchk工具,在命令行中输入: myisamchk -c -r ../data/dedecmsv4/dede_archives.MYI然后myisamchk 工具会帮助你恢复数据表的索引。重新启动mysql,问题解决。问题分析:1、错误产生原因,有网友说是频繁查询和更新dede_archives表造成的索引错误,因为我的页面没有静态生成,而是动态页面,因此比...