SQL Function used to alter an existing table object.

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MySQL - Alter Table Fails As Workbench Tries To Create Existing Table

I have been trying to add another column to a table in my database using MySQL Workbench. This generates an 'ALTER TABLE' command which then fails as it fails attempting a 'CREATE TABLE, which it ...
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2answers
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How to delete a column named grave accent in MySQL

As title. Every time when i try to execute the query: ALTER TABLE tablename DROP COLUMN ```, got syntax error, which is understandable. So, what should i do to delete this column whose name is the ...
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1answer
492 views

Alter mysql database engine doesn't work from cluster to other

I got into this issue when I tried to alter my database table engine to InnoDB from ndbcluster, It did not work. But When I changed engine from InnoDB to ndbcluster it worked. It did not throw any ...
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1answer
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Table1 ID is auto increment and i also want to store the information from table 2 against that auto generated ID

This table has an auto increment ID on back end. "INSERT INTO `test`.`personal_info` (`username`, `email`,`password`) VALUES ('$username','$email','$password')"; This was for signing up of one ...
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1answer
99 views

MS Access: adding column if not exist (or try/catch it)

this is an easy question, but I can't find out the solution... I have to check if a column exists and add it if the test is negative. How can I do with only sql code? This is the syntax for SQL ...
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0answers
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Error in partition switching in Sql Server 2014 when migrating a database from Sql Server 2005

I am migrating an old database from SQL Server 2005 to SQL Server 2014. This database has a partitioned table; a scheduled job periodically moves old data from the "online" table to the the historical ...
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0answers
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MySQL Cluster - 'ONLINE' is deprecated Please use ALGORITHM=INPLACE

I'm just testing MySQL CLuster 7.3.8. According to the documentation, after adding new Data Nodes I need to ALTER my tables to spread the data to the new Data Nodes. So, I run: ALTER ONLINE TABLE ...
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Prevent truncate without denying ALTER permission

Is there a way to disallow users from truncating a table without denying ALTER permission on the table? Users should be able to maintain the standard ALTER permissions (adding columns to a table, ...
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0answers
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pt-online-schema-change with circular replication

So I have an alter table (adding 4 columns) to do on a fairly large table (74 million rows). The problem is this table has firstly to remain online and writable during the whole operation and ...
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0answers
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SQL Server : ALTER TABLE tablename SWITCH PARTITION 2 to tempempty

Have a sliding partition where I need to remove the trailing partition when they expire. I create an empty table that matches the existing table. When I create the empty table, I specify the file ...
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Is doing an online alter on a MySQL table to add comments safe?

Is doing an online alter on a massive MySQL table to add or edit table or column 'comments' safe? Or do you need to take precautions like you would while adding, removing columns, etc on that table?
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Granting permission on an altered table in Teradata

I have a table, which has two columns say A and B as part of the Primary index PI_AB. I have to alter the length of B column - increase it. I was planning to alter the primary index to just have A, ...
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How alter on infobright (BRIGHTHOUSE storage engine) actually works

I have been using infobright-3.4.1 (5.1.40) for data warehousing. I know it is outdated version but there no plan to upgrade the version currently. Even though infobright is build on mysql, the way it ...
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0answers
256 views

How to avoid 2013 error when executing ALTER TABLE

I have a huge table (2.8 GB) and I need to add a column. After I run this query I experience a lost connection error (Error code: 2013. Lost connection to MySQL server during query): ALTER TABLE ...
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0answers
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How to diagnose MariaDB crash when changing InnoDB column to AUTO_INCREMENT?

I have this table, and I'm trying to change the first column to AUTO_INCREMENT: +------------+---------------------+------+-----+---------+-------+ | Field | Type | Null | Key | ...
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0answers
43 views

How to combine a default value with a new value?

I need to start the value of a column with CON, so when I insert a new value, it needs to "combine" both default and new value; for example: In the CONTACTO_ASP2_TAB table, the column NOMBRE has to ...
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0answers
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PostgreSQL: How can I identify the connections which is blocking ALTER TABLE?

I would like to add some fields to a table in all testing and production DBs, all of which are stored in PostgreSQL 9.3 on Amazon RDS. ALTER TABLE users DROP COLUMN IF EXISTS device_language; ALTER ...
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288 views

Is it possible to auto generate ALTER scripts for differences between existing DB and updated schema?

I built a internal web application for a client that manages applications to programmes for their employees. The system is Classic ASP on a set of clustered and load balanced Windows 2000 Servers ...