Sql-server – Migration of create statement from SQL Server to MySQL

MySQLsql server

I have a table that have the following table structure

CREATE TABLE [dbo].[ASAT](
  [ID] [bigint] IDENTITY(1,1) NOT NULL,
  [ASATID]  AS ('ASAT'+right('00000000000000000000'
  +CONVERT([varchar](19),[ID],0),(20))) PERSISTED NOT NULL,
  [Created] [nvarchar](8) NOT NULL DEFAULT (CONVERT([varchar],dateadd(year,
  (0),getdate()),(112)))
) ON [PRIMARY]

When I used the MySQL Migration Wizard to convert the above Microsoft database table structure, I got errors that both datatype for my fields ASATID and Created was not supported (in MySQL).

What are the recommended ways to proceed such data type differences when performing a database migration from SQL Server to MySQL?

Best Answer

This answer will apply to your question : Insert Value based on One Column based on Value on another Column

AFAIK, and based on the link posted, you cannot create a computed column in MySQL. You should either:

Do the calculation outside of the database, when inserting OR
Create a trigger on the table to populate the value for you OR
Create a view to represent the data in the way you want.

Related Solutions

Sql-server – Parent-Child Tree Hierarchical ORDER

OK, enough brain cells are dead.

SQL Fiddle

WITH cte AS
(
  SELECT 
    [ICFilterID], 
    [ParentID],
    [FilterDesc],
    [Active],
    CAST(0 AS varbinary(max)) AS Level
  FROM [dbo].[ICFilters]
  WHERE [ParentID] = 0
  UNION ALL
  SELECT 
    i.[ICFilterID], 
    i.[ParentID],
    i.[FilterDesc],
    i.[Active],  
    Level + CAST(i.[ICFilterID] AS varbinary(max)) AS Level
  FROM [dbo].[ICFilters] i
  INNER JOIN cte c
    ON c.[ICFilterID] = i.[ParentID]
)

SELECT 
  [ICFilterID], 
  [ParentID],
  [FilterDesc],
  [Active]
FROM cte
ORDER BY [Level];

Sql-server – Migrating from SQL Server to MySQL using MySQL Workbench tool

Well, since you have data currently stored in SQL Server, and it's already in an NVARCHAR column, then either it's an NVARCHAR <= 4000 (in which case you can't lose any data, and should just change all instances of NVARCHAR(8000) to NVARCHAR(4000)), or it's an NVARCHAR(MAX) column, in which case you change all instances of NVARCHAR(8000) to NVARCHAR(MAX). Or just leave out those CASTs - do you really need them?

As an aside, you should probably change as NTEXT to as NVARCHAR(MAX) as well.

Best Answer

Related Solutions

Sql-server – Parent-Child Tree Hierarchical ORDER

Sql-server – Migrating from SQL Server to MySQL using MySQL Workbench tool

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