SQL Server Unique constraint for values in different columnI agree 100% with the above comments ...
We should follow certain best practices while designing objects in SQL Server. For example, a table should have primary keys, identity columns, clustered and non-clustered indexes, constraints to ensure data integrity and performance. Even we follow the best practices, and we might face issues suc...
Application.DisplayAlerts=False ' Loopthrougheach rowincolumn B For Each cell In wsSearch.Range("B2:B"&wsSearch.Cells(wsSearch.Rows.Count,"B").End(xlUp).Row)If cell.Value<>""Then ' Checkifthecellis notempty ownerName=cell.Value destTableName="Table"&ownerName ' Adju...
let me clarify my inquiry more, for Example i have unit with number 23*** repeat 3 times ( Duplicates ) but in column ( L ) have value True also false , how can make the excel highlight the row for unit 23***
Check constraints or partition function of source table ALTER TABLE with variable TableName ALTER vs UPDATE when creating a new column with default value. Alternate queries for MERGE Alternative for OR in WHERE clause Alternative for PIVOT Alternative of CURSOR in SQL to improve performance ?
Generic Multiple Constraints To "T" Generic property in non generic class Generics vs Dynamic Geometric Data Extraction from text file of STEP 3D model Get "Right" HResult (Error ID) from Exception Get 503 HTTP Status Code Get 64 Bit Registry Value Get a cellvalue from a DataGridView returns...
which makes sense. Constraints like primary key would produce duplicates otherwise in some cases, and ACID would break in other cases. I really hope that is clear, and while the documentation may need to be updated, this is not a bug in repeatable-read. To make the latter point clear: -...
Of course foreign Key constraints should be removed before dropping related tables. Our application developer already corrected his PHP code to reflect this. But I think that a failed (because of a foreign key constraint error) statement (in our case DROP) must not be written into the binlog...
导出,参数为ROWS设置为N 1 exp FULL=y GRANTS=y CONSTRAINTS=y ROWS=n -- For Data pumpexport, the parameter is CONTENT set to METADATAONLY 对于数据泵导出,将参数CONTENT设置为METADATA_ONLY 1 expdp FULL=y CONTENT=metadata_only Still have questions还有问题 In case you need to move an...
However, sqlite doesn't allow dropping unnamed unique constraints: https://stackoverflow.com/questions/42013265/remove-unique-constraint-on-a-column-in-sqlite-database Solution would be to rename table, create new table and copy over data in a new migration. Or use some other db :) ...