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SQL Server -- updating the `sys.*` tables and not just reading them


SQL Server -- updating the `sys.*` tables and not just reading them

By : stchlk
Date : November 22 2020, 10:31 AM
hop of those help? These tables are informational only. I want to make this clear: the sys.* and INFORMATION_SCHEMA.* views exist to provide schema information from the database engine in a useful format. They do not represent the actual schema of the database*, and modifying them is thus impossible. The only way to change your schema is to use DDL (Data Definition Language) statements, such as ALTER TABLE.
In your case, you can use a cursor to iterate through all columns with the wrong type, generate SQL statements to correct that, and execute them dynamically. Here's a skeleton of how that would look:
code :
DECLARE column_cursor CURSOR FOR
 SELECT schemas.name AS schema_name,
        objects.name AS table_name,
        columns.name AS column_name
   FROM sys.columns
   JOIN sys.objects
     ON objects.object_id = columns.object_id
   JOIN sys.schemas
     ON schemas.schema_id = objects.schema_id
  WHERE objects.type = 'U'
    AND columns.user_type_id = 108

DECLARE @schema_name VARCHAR(255)
DECLARE @table_name VARCHAR(255)
DECLARE @column_name VARCHAR(255)

OPEN column_cursor

FETCH NEXT FROM column_cursor INTO @schema_name, @table_name, @column_name

WHILE @@FETCH_STATUS = 0
BEGIN
    DECLARE @sql VARCHAR(MAX)

    -- TODO: modify to change to the actual type, scale and precision you want; also you may need to adjust for NOT NULL constraints, default constraints and foreign keys (all exercises for the reader)
    SET @sql = 'ALTER TABLE ' + QUOTENAME(@schema_name) + '.' + QUOTENAME(@table_name) + ' CHANGE COLUMN ' + QUOTENAME(@column_name) + ' DECIMAL(12, 2)'
    EXEC(@sql)  

    FETCH NEXT FROM column_cursor INTO @schema_name, @table_name, @column_name
END

CLOSE column_cursor
DEALLOCATE column_cursor


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SQL Server Version Updating Tables

SQL Server Version Updating Tables


By : monsieur deBug
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I am part of a software development company looking for a good way to update my SQL Server tables when I put out a new version of the software. I know the answer is to probably use scripts in one form or another. , Suggest you look at Red_gate's SQlCompare
updating multiple tables with triggers - SQL Server

updating multiple tables with triggers - SQL Server


By : user1602392
Date : March 29 2020, 07:55 AM
This might help you In the DELETE FROM statement, you have to add the INSERTED pseudo-table to the tables you're operating on (in the FROM clause), like so:
code :
DELETE dbo.CurrentItems 
  FROM dbo.CurrentItems
     , INSERTED
 WHERE dbo.CurrentItems.CurrentItemId = INSERTED.Id

INSERT INTO CurrentItems
SELECT * FROM INSERTED
WHERE IsActive = 1
DELETE dbo.CurrentItems 
  FROM dbo.CurrentItems CI
       INNER JOIN INSERTED I ON CI.CurrentItemId = I.Id
Updating TextBox on the client with Javascript and reading the value from the Server

Updating TextBox on the client with Javascript and reading the value from the Server


By : Rishi Mehta
Date : March 29 2020, 07:55 AM
wish of those help By any chance, are you marking your textbox as "readonly" and then trying to do an update ?
http://aspadvice.com/blogs/joteke/archive/2006/04/12/16409.aspx
Transaction isolation and reading from multiple tables on SQL Server Express and SQL Server 2005

Transaction isolation and reading from multiple tables on SQL Server Express and SQL Server 2005


By : 蹦蹦网
Date : March 29 2020, 07:55 AM
hope this fix your issue Your choice of loading all data in one go means very few options:
Use sp_getapplock to serialise access through the relevant code Use TABLOCKX, HOLDLOCK on the reads in a transaction
Updating SQL Server tables through BizTalk's SQL adapter

Updating SQL Server tables through BizTalk's SQL adapter


By : Berry
Date : March 29 2020, 07:55 AM
This might help you You would need to add the three fields to the message schema your SQL data is mapped onto.
Also update the SQL statement which is executed inside your sql adapter settings to return the new columns.
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