Solution 2: Add primry key in your table then you can easily remove duplicates from your table using below query: DELETEFROMmemberWHEREidIN(SELECT*FROM(SELECTidFROMmemberGROUPBYmember_id, quiz_num, question_num, answer_numHAVING(COUNT(*)>1) )ASA ); Solution 3: SELECTDISTINCT*INTOTableA_Ver...
"to": "semijoin", "chosen": true } } ] "expanded_query": "/* select#1 */ select `t_table_1`.`id` AS `id`,`t_table_1`.`task_id` AS `task_id` from `t_table_1` semi join (`t_table_2`) where (1 and (`t_table_2`.`uid` = 1) and (`t_table_1`.`task_id` =...
再执行pt-duplicate-key-checker给出的解决方案 mysql [localhost:5727] {root} (sbtest) > ALTER TABLE `sbtest`.`sbtest1` DROP INDEX `id`; Query OK, 0 rows affected (0.01 sec) Records: 0 Duplicates: 0 Warnings: 0 mysql [localhost:5727] {root} (sbtest) > ALTER TABLE `sbtest`.`sbtes...
#define ER_WARN_TOO_FEW_RECORDS 1261 "Row %ld doesn't contain data for all columns", #define ER_WARN_TOO_MANY_RECORDS 1262 "Row %ld was truncated; It contained more data than there were input columns", #define ER_WARN_NULL_TO_NOTNULL 1263 "Data truncated, NULL supplied to NOT NULL ...
"expanded_query":"/* select#2 */ select `t_table_2`.`id` from `t_table_2` where (`t_table_2`.`uid` = 1)" }, { "transformation": { "select#":2, "from":"IN (SELECT)", "to":"semijoin", "chosen":false } },
Description: Sometimes connections get stuck in the 'query end' state and the only way to remove them is to restart the server (kill won't work). The queries seen have been simple joins and once a simple single-table primary key look-up select. The tables are InnoDB. Here's how the ...
• Error number: 1063; Symbol: ER_WRONG_FIELD_SPEC; SQLSTATE: 42000 Message: Incorrect column specifier for column '%s' • Error number: 1064; Symbol: ER_PARSE_ERROR; SQLSTATE: 42000 Message: %s near '%s' at line %d 7 • Error number: 1065; Symbol: ER_EMPTY_QUERY; SQLSTATE: ...
If I remove change 'order by reptnum desc' to 'order by reptnum asc' the query still returns identical records. If I remove 'order by' it effectively 'fixes' the problem and returns unique records. Very strange. I think its a bug. ...
sbtest1 add column e int not null default 0; Query OK, 0 rows affected (0.03 sec) Records...
Before returning query results, information in the FTS_*_DELETED table is used to filter out deleted DOC_IDs. The benefit of this design is that deletions are fast and inexpensive. The drawback is that the size of the index is not immediately reduced after deleting records. To remove full-...