How do you validate a column only if it's new item being added?
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2010 Column Validation Formula
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Validation Rule to prevent editing record
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How to check if a columns value was explicitly specified in a PL/SQL BEFORE UPDATE trigger?
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Form validation - When should error messages be triggered?
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Re-number a list when a new entry is inserted
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android update database column based on the current column value
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Column validation for US phone number format
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Custom column for changing post status via ajax
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How to skip validation when a specific button is clicked?
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How to check if list item already exist when adding it with
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How to restrict a column value in SQLite / MySQL
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How to apply a regex on a column fetched from DB
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How can I detect if a player has a specific item with a specific datavalue in their inventory?
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Check that criteria are met in a before insert trigger
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How do you scope uniquenuess based on two values with Rails 3 validations?
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How do I find out whenever a value changes in a certain column?
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jQuery Validate Plugin - How to create a simple custom rule?