I'm investigating the maximum number rows possible in a MySQL table for a client. So far it looks like the maximum is based on size not number of roow - so for example a table with many columns and blob datatypes would reach the maximum much faster than a table with few rows and ...
在这种情况下,我们吸取教训,不能使用show create table看压缩状态,而是应该用show table status; yaml showtablestatuslike'test_1'\G;***1.row***Name:test_1Engine:InnoDBVersion:10Row_format:CompactRows:0Avg_row_length:0Data_length:16384Max_data_length:0Index_length:0Data_free:0Auto_increment:NULL...
3 rows in set (0.00 sec)test> create table test_1 (x int) ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;Query OK, 0 rows affected, 4 warnings (0.07 sec)test> show warnings;+---+---+---+ | Level | Code | Message | +---+---+---...
Task: Find the highest price per article. SELECTarticle,MAX(price)ASpriceFROMshopGROUPBYarticleORDERBYarticle;+---+---+|article|price|+---+---+|0001|3.99||0002|10.99||0003|1.69||0004|19.95|+---+---+ PREVHOMEUPNEXT
-> `rows` DOUBLE , -> `Extra` VARCHAR (765) -> ); Query OK, 0 rows affected (0.00 sec) mysql> INSERT INTO `ttt` (`id`, `select_type`, `table`, `type`, `possible_keys`, `key`, `key_len`, `ref`, `rows`, `Extra`) VALUES('1','PRIMARY','aaa','index',NULL,'email_...
You can also do this by sorting all rows descending by price and get only the first row using the MySQL-specificLIMITclause, like this: SELECTarticle,dealer,priceFROMshopORDERBYpriceDESCLIMIT1; Note If there were several most expensive articles, each with a price of 19.95, theLIMITsolution wo...
启用MySQL 的慢查询日志功能,找出耗时较长的查询并进行优化。 优化查询 使用索引 减少不必要的 JOIN 限制返回的数据量 3. 分批处理数据 如果脚本需要处理大量数据,可以考虑分批处理,避免一次性处理所有数据。 <?php$batchSize=1000;$offset=0;do{ $rows = YourModel::query() ...
在mysql插入数据时有时会出现以下异常: sql ERROR 1709 (HY000) at line 213 in file: 'z_blog.sql': Index column size too large. The maximum column size is 767 bytes. 1 原因 由于MySQL的Innodb引擎表索引字段长度的限制为767`字节,因此对于多字节字符集的大字段或者多字段组合,创建索引...
I need to do this by using Alteryx only, can't reduce the table size, need to transfer all 850 tables, and in Mysql SESSION MAX_EXECUTION_TIME=0 Need help with this urgently. Batch Macro Error Message In Database Iterative Macro
Hi, What is the maximum possible number of rows in a MySQL Table, is this tunable or is it OS dependent ? Thanks a bunch! -SMNavigate: Previous Message• Next Message Options: Reply• Quote Subject Written By Posted maximum number of rows in a MySQL Table SHOE MAKER March 24,...