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MySQL: Overlay modifications on original data while indexing on a field that itself has modifications

I have a MySQL table of original_data that is important for historical/auditing purposes and should not ever be changed. I want to be able to mark up these data with modifications, e.g. to correct ...
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Is unique index combined with a “not null” constraint equivalent to a PK constraint?

I have these legacy table definitions (from here): CREATE TABLE [dbo].[JobItems] ( [ItemId] UNIQUEIDENTIFIER NOT NULL, -- lots of other columns CONSTRAINT [PrimaryKey_GUID_HERE] ...
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How to verify replication data integrity in SQL Server when using external replication engine

I am looking for a way to verify that data I am replicating between SQL Server databases is making it to the destination OK. Data is being replicated using an external replication engine, no built-in ...
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MySQL: Fixing Unique key constraint violation

I have a database with an unique key constraint. When I import this database from a dump created by mysqldump I get '14698-3' for key 'UNQ_CATALOGS EARCH_FULLTEXT_PRODUCT_ID_STORE_ID' But when I ...
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Pentaho getfilename error

I am try to send 20 mail with attachments using pentahi DI, Jobs are like below Get File Names--->Add constants--->Mail But some mails are not send with below error, Thay say files are not ...