can anyone help me that how to drop unique constraint from an existing mysql table. And also how to find constraint name, active in which table, which field... etc. (in oracle which is in user_constraints table). I have tried alter table table_name drop constraint constraint_name. bu...
1.7.3.1 PRIMARY KEY and UNIQUE Index Constraints 1.7.3.2 FOREIGN KEY Constraints 1.7.3.3 ENUM and SET Constraints MySQL enables you to work both with transactional tables that permit rollback and with nontransactional tables that do not. Because of this, constraint handling is a bit different in...
To delete records from a MySQL table, you need to use the DELETE statement in SQL. Here is an example: DELETE FROM table_name WHERE condition; Explanation: "DELETE FROM" is the beginning of the statement that indicates you want to delete records from a table. "table_name" is the name ...
# Step 1: Copy distinct values to temporary table CREATE TEMPORARY TABLE tmp_user ( SELECT id, name FROM user GROUP BY name ); # Step 2: Remove all rows from original table DELETE FROM user; # Step 3: Add Unique constraint ALTER TABLE user ADD UNIQUE(name); # Step 4: Remove all ...
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(or record file crashed) MySQL error code 135 = No more room in record file MySQL error code 136 = No more room in index file MySQL error code 141 = Duplicate unique key or constraint on write or update MySQL error code 144 = Table is crashed and last repair failed MySQL error code ...
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MySQL installed and secured on the server, as outlined inHow To Install MySQL on Ubuntu 20.04. This guide was verified with a non-root MySQL user, created using the process described inStep 3. Note: Please note that many RDBMSs use their own unique implementations of SQL. Although the comma...
In active-active, both servers are managing traffic, spreading the load between them.If the servers are public-facing, the DNS would need to know about the public IPs of both servers. If the servers are internal-facing, application logic would need to know about both servers....
how to drop unique constraint 15447 Sultana Jahan Rini February 16, 2006 03:41AM Re: how to drop unique constraint 8131 Roland Bouman February 22, 2006 01:12PM Sorry, you can't reply to this topic. It has been closed. Content reproduced on this site is the property of the respective ...