大约有 6,100 项符合查询结果(耗时:0.0279秒) [XML]

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How do I use CREATE OR REPLACE?

... post for the third time, I'll reformulate this: This does not work on tables :) And yes, there is documentation on this syntax, and there are no REPLACE option for CREATE TABLE. share | impro...
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Get table column names in MySQL?

Is there a way to grab the columns name of a table in mysql? using php 19 Answers 19 ...
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Psql list all tables

I would like to list all tables in the liferay database in my PostgreSQL install. How do I do that? 6 Answers ...
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How to add a primary key to a MySQL table?

... After adding the column, you can always add the primary key: ALTER TABLE goods ADD PRIMARY KEY(id) As to why your script wasn't working, you need to specify PRIMARY KEY, not just the word PRIMARY: alter table goods add column `id` int(10) unsigned primary KEY AUTO_INCREMENT; ...
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Is a one column table good design? [closed]

It it ok to have a table with just one column? I know it isn't technically illegal, but is it considered poor design? 15 A...
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How to DROP multiple columns with a single ALTER TABLE statement in SQL Server?

... like to write a single SQL command to drop multiple columns from a single table in one ALTER TABLE statement. 11 Answers...
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Modify table: How to change 'Allow Nulls' attribute from not null to allow null

How to change one attribute in a table using T-SQL to allow nulls (not null --> null)? Alter table maybe? 8 Answers ...
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The ALTER TABLE statement conflicted with the FOREIGN KEY constraint

I have a problem when trying to add a foreign key to my tblDomare table; what am I doing wrong here? 18 Answers ...
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How can you represent inheritance in a database?

...e SQL Entity-Attribute-Value antipattern. This is a brief overview: Single Table Inheritance (aka Table Per Hierarchy Inheritance): Using a single table as in your first option is probably the simplest design. As you mentioned, many attributes that are subtype-specific will have to be given a NULL v...
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CSS display:table-row does not expand when width is set to 100%

... If you're using display:table-row etc., then you need proper markup, which includes a containing table. Without it your original question basically provides the equivalent bad markup of: <tr style="width:100%"> <td>Type</td> ...