1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id. +---+---+ | Id | Email | +---+---+ +---+---+ Id is the primary k...
void set_sent_row_count (ha_rows count) void inc_sent_row_count (ha_rows count) void inc_examined_row_count (ha_rows count) void inc_status_created_tmp_disk_tables () void inc_status_created_tmp_tables () void inc_status_count_hit_tmp...
Now we attempt to insert two rows, one of which contains a duplicate key value, usingON DUPLICATE KEY UPDATE, where theUPDATEclause itself results in a duplicate key value: mysql>INSERTINTOtVALUESROW(2,3),ROW(3,3)ONDUPLICATEKEYUPDATEa=a+1,b=b-1;ERROR 1062 (23000):Duplicate entry '1...
select * from (select sid from S); The xsql optimizer is not always smart enough to efficiently transform nested queries. So sometimes query with views will be less efficient than one written manually without views. I can not give you precise example now or give you some estimation how much...
Bug #114065marked as duplicate of this one. [10 Mar 2024 21:32] Ryousuke Tanida Hello. As reported inBug #114065, it seems that a similar issue has occurred. Currently, a timeout occurs when pausing due to debugging, so proper development is not possible with the current version. When ...
If you use one of these methods to demonstrate the bug, usemysqlbugto prepare a bug report and send it tobugs@lists.mysql.com. If you have a phantom, a problem that does occur but that you cannot duplicate “at will”: Verify that there is no user error involved. For example, if ...
MySQL uses the following algorithm for REPLACE (and LOAD DATA ... REPLACE): Try to insert the new row into the table While the insertion fails because a duplicate-key error occurs for a primary key or unique index: Delete from the table the conflicting row that has the duplicate key value...
Rows that pass both tests may be returned as the query’s result. INSERT InnoDB records the current system version number with the new row. DELETE InnoDB records the current system version number as the row’s deletion ID. UPDATE InnoDB writes a new copy of the row, using the system vers...
A different bug, indeed. See this line in the test: INSERT INTO bug_61209 VALUES (), (); if you change it to insert (),(),(),() - that is, four rows, there will be no duplicate key error. And the bug is here: next = (current - offset) / step; ... next_value = next...
The source database must have PRIMARY KEY or UNIQUE constraints and all fields must be unique. Otherwise, duplicate data may exist in the destination cluster. Billing Synchronization typeTask configuration fee Schema synchronizatio...