大约有 40,000 项符合查询结果(耗时:0.0228秒) [XML]

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Schema for a multilanguage database

... What do you think about having a related translation table for each translatable table? CREATE TABLE T_PRODUCT (pr_id int, PRICE NUMBER(18, 2)) CREATE TABLE T_PRODUCT_tr (pr_id INT FK, languagecode varchar, pr_name text, pr_descr text) This way if you have multiple translatab...
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Get button click inside UITableViewCell

I have a view controller with a table view and a separate nib for the table cell template. The cell template has some buttons. I want to access the button click along with the index of the cell clicked inside the view controller where I have defined the Table view. ...
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MySQL check if a table exists without throwing an exception

What is the best way to check if a table exists in MySQL (preferably via PDO in PHP) without throwing an exception. I do not feel like parsing the results of "SHOW TABLES LIKE" et cetera. There must be some sort of boolean query? ...
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Calendar Recurring/Repeating Events - Best Storage Method

...g on a Tuesday and every week starting on a Thursday. Assuming I have two tables, one called events like this: ID NAME 1 Sample Event 2 Another Event And a table called events_meta like this: ID event_id meta_key meta_value 1 1 repeat_start 129...
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Why do we always prefer using parameters in SQL statements?

...ommands against your database, including deleting it If they wrote 0; Drop Table employee: SELECT empSalary from employee where salary = 0; Drop Table employee The table employee would then be deleted. In your case, it looks like you're using .NET. Using parameters is as easy as: C# string s...
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How to change the foreign key referential action? (behavior)

I have set up a table that contains a column with a foreign key, set to ON DELETE CASCADE (delete child when parent is deleted) ...
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JavaScript hashmap equivalent

...ipt is a high-level language. Its basic primitive (Object) includes a hash table to keep properties. This hash table is usually written in a low-level language for efficiency. Using a simple object with string keys we use an efficiently implemented hash table without any efforts on our part. How do ...
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How to drop column with constraint?

... problematic DEFAULT constraint, after that you can drop the column alter table tbloffers drop constraint [ConstraintName] go alter table tbloffers drop column checkin But the error may appear from other reasons - for example the user defined function or view with SCHEMABINDING option set for th...
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mysql -> insert into tbl (select from another table) and some default values [duplicate]

As the title says, I am trying to insert into one table selecting values from another table and some default values. 5 Ans...
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Display names of all constraints for a table in Oracle SQL

I have defined a name for each of the constraint for the multiple tables that I have created in Oracle SQL. 6 Answers ...