MySQL get table size SELECT TABLE_NAME AS `Table`, ROUND((DATA_LENGTH + INDEX_LENGTH) /1024/1024) AS `Size (MB)` FROM information_schema.TABLES WHERE TABLE_SCHEMA ="db"ORDER BY (DATA_LENGTH +INDEX_LENGTH) DESC; selecttable_nameas'tableName', round(data_length+index_length)/1024/1024...
创建一个存储过程,用于查询表的大小: DELIMITER //CREATE PROCEDURE get_table_size(IN database_name VARCHAR(255), IN table_name VARCHAR(255))BEGINSELECT table_name, table_rows, data_length, index_lengthFROM information_schema.tablesWHERE table_schema = database_name AND table_name = table_name;...
Here is a super simple SQL query to determine the size of all tables in a given database: SELECTTABLE_NAMEAS"Table",round(((data_length+index_length)/1024/1024),2)ASSize_in_MBFROMinformation_schema.TABLESWHEREtable_schema='my_db_name'ORDERBYSize_in_MBDESC ...
假设我们有一个名为test_db的数据库,其中包含表users和orders,我们可以使用上述SQL语句查询它们的大小: SELECTtable_nameAS`Table`,round(((data_length+index_length)/1024/1024),2)`Size in MB`FROMinformation_schema.tablesWHEREtable_schema='test_db'ORDERBY`Size in MB`DESC; 1. 2. 3. 4. 5. 6. ...
| Total Index Size | +---+ | 0.10 MB | +---+ 1 row in set (0.00 sec) 查看指定库的指定表的索引大小 mysql> SELECT CONCAT(ROUND(SUM(index_length)/(1024*1024), 2), ' MB') AS 'Total Index Size' FROM TABLES WHERE table_schema = 'mysql' and table_name='user'; +---+ | To...
(),是使用临时表,按照rowid进行排序在内存表中进行排序 磁盘临时表 其实并不是所有的临时表都是内存表,tmp_table_size配置限制了内存临时表,默认大小是16M...而优先级算法,可以精准的获取最小的三个word 从临时表中获取前三行,组成一个最大堆然后拿下一行数据,和最大堆的R比较,大于R,则丢弃,小于R,则替换...
then what will be the size of my table? do i need 'SUM_OVER_ALL_BTREE_KEYS(max_length_of_key + sizeof(char*) × 4)' as i have only hash keys? thanks in advance :) Shantonu Subject Views Written By Posted How to get size of memory table??
CopySELECT table_schema AS "Database", ROUND(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" FROM information_schema.TABLES GROUP BY table_schema; Depending on how many databases you have and how large they are, this command may take a minute or two to complete. ...
concat(truncate(sum(max_data_length)/1024/1024,2),'mb') as max_data_size, \ concat(truncate(sum(data_free)/1024/1024,2),'mb') as data_free, \ concat(truncate(sum(index_length)/1024/1024,2),'mb') as index_size\ from information_schema.tables where table_schema = 'erongtu_tyb20...
if(table->file->ha_rnd_init(true))returntrue;初始化handlerfor(int i=0;i<offset_table+1;i++){if(table->file->ha_rnd_next(table->record[1]))returntrue;让指针跳到指定要更新的那一行,注意这里该行的值存在record[1]}memcpy(table->record[0],table->record[1],(size_t)table->s->recle...