You use a database at compatibility level 100 in Microsoft SQL Server. You have a table in the database that contains a PERSISTED computed column. The PERSISTED computed column uses the SOUNDEX function. In this scena...
Gets the Boolean property value that specifies whether the computed value of the Column object is saved with the data, thus avoiding a computation each time the column is accessed. 命名空間: Microsoft.SqlServer.Management.Smo 組件: Microsoft.SqlServer.Smo (在 Microsoft.SqlServer.Smo.dll 中) 語法...
AlterServerRoleStatement AlterServiceMasterKeyOption AlterServiceMasterKeyStatement AlterServiceStatement AlterSymmetricKeyStatement AlterTableAddTableElementStatement AlterTableAlterColumnOption AlterTableAlterColumnStatement AlterTableAlterIndexStatement AlterTableAlterPartitionStatement AlterTableChangeTrackingModificatio...
Which one is better? PERSISTED Column or XML Indexes?项目 2013/03/21 I had a chance to work on the XML area. The customer had a performance issue with some queries which were related to XML data. The customer was using a banking application called TEMENOS T24 on Microsoft SQL Se...
test "detoasts column values in deletes", %{db_conn: conn} do id = Ecto.UUID.generate() {:ok, bin_uuid} = Ecto.UUID.dump(id) {id, bin_uuid} = gen_uuid() long_string_1 = gen_random_string(2500) long_string_2 = gen_random_string(3000) @@ -199,8 +276,7 @@ defmodule...
'VARCHAR' is not a recognized built-in function name. 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. "EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have ...
For such scenarios where calculated values are required or values are generated through manipulation on other columns, we have a powerful feature provided in SQL Server. This feature is “Computed Columns”. A computed column is computed from an expression that can use another column or columns in...
To set up the scene so you can reproduce and learn. Below we create a single-column table that is an identity and also primary key. Therefore, an index is created which also will create statistics on our column. DROP TABLE dbo.Test ...
Typically the overhead to materialize the computed column (cc) at run time trivial. If it is, a cc has a lot of advantages, so I suggest using it as intended. A derived table risks differing definitions in multiple queries. A view forces people to use different queries to access the dat...
Gets a value that indicates whether the computed value of the column is saved with the data. 命名空间: Microsoft.SqlServer.Management.SqlParser.Metadata 程序集: Microsoft.SqlServer.Management.SqlParser(在 Microsoft.SqlServer.Management.SqlParser.dll 中) 语法 C# 复制 public bool IsPersisted { get;...