What is the easiest way to add a TIMESTAMP column in the MySQL table? (I need to add it as I'm still using my MS Access front-end and linking to the MySQL back-end via MyODBC). I can manually edit the SQL in the "Manual Edit" step to add the extra column, but is there a...
The reason for this is that the anonymous-user account has a more specific Host column value than the 'finley'@'%' account and thus comes earlier in the user table sort order. (For information about user table sorting, see Section 4.6, “Access Control, Stage 1: Connection Verification”....
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Character Sets and Collations in MySQL Specifying Character Sets and Collations Connection Character Sets and Collations Configuring Application Character Set and Collation Error Message Character Set Column Character Set Conversion Collation Issues Unicode Support Supported Character Sets and Collatio...
mysql - adding alias columns as new column I have the following mysql query.. select x.timest, max(case when xdevloc='outside' then x.value end) as outside, max(case when x.devloc='hvac_main_return' then x.value end) as hvac_main_return, max(case when x.devloc='hvac_...
to add another unique column to act as the primary key. The internal GEN_CLUST_INDEX one is not exposed to the upper MySQL layer, and only theInnoDB engine is aware of it, hence it is useless for replication speed. Therefore, an explicit PK is always a better solution. However, if...
1 row in set, 1 warning (0.00 sec) A conclusionfrom this is we want smallerprimary keys if possible. ’s this table accordingly 1 2 3 mysql> alter tablet1 drop primarykey, column idint primarykey autoincrement; QueryOK, 0 rows affected(16.66 sec) Records: 0 Duplicates...
1. If you write user-defined functions, you must installobjectfilesinaddition to the server itself. If you compile your function into the server, you don't need to do that.2. Native functions require you to modify a source distribution. UDFsdonot. You can add UDFs to a binary MySQL dis...
In my environment I have a table with around 5 million records and two indexes. I want to know what will be the effect on the existing indexes, if i add a new column to this table i.e. whether indexes are dropped and created again or updated somehow or there is no effect at al...
If the table already exists and of course is full of data, I only want to add a new column. then I can do that. The SQL looks like:- ALTER TABLE `item_master` ADD `sell_price` VARCHAR( 10 ) NULL DEFAULT '0' AFTER `description` ; THE QUESTION IS What I would like to ...