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Jun
19
comment Is it ok to let users add new columns and tables to your database?
Yes, but it would need more than one table. The OP seems to be saying that the database his code creates is a single table. (But I might have misunderstood him.)
Jun
19
comment Is it ok to let users add new columns and tables to your database?
The OP said, "An administrative User can go in and hit 'Create Database' (which is basically a table)..." I meant that they're probably better off with a database that's actually a database than with a database that's really just a table.
Jun
19
answered Is it ok to let users add new columns and tables to your database?
Jun
19
comment Deploying database changes in high availability environment
@Chris: When you want to rename a column, you don't rename a column. Column names are part of your public API. Instead, you 1) add a new column with the right name, 2) update it with the right values, 3) add either a trigger that keeps the two columns identical or you add a check constraint that guarantees both columns have the same values. Then 4) change all the applications to use the new column. Finally, 5) drop the old column. You can also use views to provide some logical data independence, depending on what kinds of changes you need to make.
Jun
16
answered Is it possible to avoid filesort?
Jun
16
comment Is it possible to avoid filesort?
What version of MySQL?
May
29
comment Dropping Hypothetical Indexes
DROP INDEX requires ALTER permission on the table. Can you issue a benign ALTER TABLE statement to test your permissions? (I know. I know. You're a sysadmin. Do it anyway.)
May
25
comment Mysql query grouping by two columns for max date takes too long
I wrote the same query. Keep in mind that l_act and l_n might need to be indexed, too.
May
25
comment Mysql query grouping by two columns for max date takes too long
What does EXPLAIN show? Paste that into your question.
May
22
comment Dropping Hypothetical Indexes
Do you think running dbcc checktable is called for?
May
21
answered Dropping Hypothetical Indexes
May
20
awarded  Caucus
May
20
awarded  Constituent
May
16
comment Database table design question
A sales order line item requires a minimum of four shipping containers? Is that right?
Apr
25
comment Enforce indirect relationship
You could well be right. That would be one of the hoops.
Apr
25
answered Enforce indirect relationship
Apr
25
answered Which of tables key to reference?
Apr
25
answered What is the benefit of two FK, when one of them can be deduced from another table?
Apr
24
comment Is this table in 3NF?
Neither normalization nor 3NF depend on my perspective or on my opinion. 3NF depends on eliminating transitive dependencies. Where's the transitive dependency in the original table? Even if there were one, it wouldn't justify the decomposition we see in this answer. No principle of normalization justifies what we see in this answer.
Apr
23
comment Is this table in 3NF?
"The argument goes that country depends on state and state depends on city." That's not true, though, is it? State certainly doesn't depend on city in the USA; we have dozens of Springfields. There are Santa Cruzes all over the world. (Springfields, too.) A foreign key can eliminate spelling errors and typos, but that won't affect the normal form. Any time you introduce an ID number--let alone three different ID numbers--in the name of normalization, you're almost certainly on the wrong track.