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SQL Add foreign key to existing column
If I am using the following SQL command in SQL Server 2008 to update a table with a foreign key constraint:
6 Answers
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How can I rename a database column in a Ruby on Rails migration?
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rename_column :table, :old_column, :new_column
You'll probably want to create a separate migration to do this. (Rename FixColumnName as you will.):
script/generate migration FixColumnName
# creates db/migrate/xxxxxxxxxx_fix_column_name....
Can I use a min-height for table, tr or td?
I am trying to show some details of a receive in a table.
7 Answers
7
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Does MySQL index foreign key columns automatically?
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Yes, but only on innodb. Innodb is currently the only shipped table format that has foreign keys implemented.
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How to delete a row by reference in data.table?
My question is related to assignment by reference versus copying in data.table . I want to know if one can delete rows by reference, similar to
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horizontal scrollbar on top and bottom of table
I've a very large table on my page. So I decided to put a horizontal scrollbar on the bottom of the table. But I would like this scrollbar to be also on top on the table.
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How to set up fixed width for ?
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I was having the same issue, I made the table fixed and then specified my td width. If you have th you can do those as well.
table {
table-layout: fixed;
word-wrap: break-word;
}
Template:
<td style="width:10%">content</td>
Please use CSS ...
How can I temporarily disable a foreign key constraint in MySQL?
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Can I just disable FOREIGN_KEY_CHECKS for a single table?
– jDub9
Dec 20 '18 at 13:53
@Pacerie...
SQL update fields of one table from fields of another one
I have two tables:
7 Answers
7
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SQL/mysql - Select distinct/UNIQUE but return all columns?
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You're looking for a group by:
select *
from table
group by field1
Which can occasionally be written with a distinct on statement:
select distinct on field1 *
from table
On most platforms, however, neither of the above will work because the behavior on the other co...