We are updating a field in sql and alter

then the second, but one field isn't written and remains NULL. Fourth table, missing the same field info, then the fifth may be missing it too. There is no consistency in which tables may not have that field written to, or when this may occur.But, the next time the user sends an update to the DB.. Now, I've (in the interim) ran update queries to replace the lost info in the tables.. Nothing has stood out so far in the logs on the SQL server..We not only have a permission field but we have a Do Not Promote field as well.If someone has opted out of a permission then we want to move it and its associated permissions to the DNP field. Remove Permissions" will remove the Permission you pass in and all other Permissions that are related to it. Add Do Not Promote" adds the permission to the Do Not Promote field and then searches Permission Codes for relatives to that codes and adds them to the Do Not Promote Field. Permission Code ); , this is calculated on the fly by removing permissions the user has from a list of all permissions.I need to automatically change this to reflect the time in the timezone the db server is in. The dates going into this column are retrieved in batches every so often (5, 10, 15 minutes), so I think the only way to go is to alter the time once it has been received, not to add a Time Modified field or something. Another option here would be to use a calendar table where you map a UTC date and time to the local date and time value.For example, if they send me PM, but I am in NYC, I would want it to be entered in the db as AM. Disadvantages here are a loss in some of the granularity.and it's being written to 5 tables, all in order, and I have error trapping enabled in my application.So, it will write to the first table, all info is there..

Obviously the smaller the volume the less beneficial this solution will be.Whenever ALTER command adds any new column or attribute in a relation then it by default initializes the value of that attribute for all tuple as NULL.The Syntax of ALTER command is discussed below: /* add a column to the existing table*/ ALTER TABLE table_name ADD column_name column-definition; /* drop a column from the existing table*/ ALTER TABLE table_name DROP COLUMN column_name; /* rename a column in the existing table*/ ALTER TABLE table_name RENAME COLUMN old_name TO new_name; /* Alter the datatype of an already existing column in the table*/ ALTER TABLE table_name ALTER COLUMN column_name column_type; The above commands are the generalised form of add, delete, rename commands.I am updating a table with new values based on a spreadsheet - which means I'm using multiple Now, during my research on this I managed to find some documentation on how SQL Server handles this - which is that it uses the UPDATED value. You could also get constraint errors because of how updates are applied (especially on uniqueness) The way to do many updates in one go to avoid intermediate errors is to do a single update Thanks - that's definitely my problem alright.It states that this behaviour is different to how "Normal SQL" handles it, so I'm hoping this will not be a problem when using SQL Server. Unfortunately I'm trying to have an Excel formula in the spreadsheet (my source document for the Asset ID updates) automatically generate the SQL I need, and it will be tricky to use this to update the 18,000 rows I need.The ALTER command is a Data Definition Language (DDL) Command.

530

Leave a Reply