简单示例 altertablemyTableaddmyNewColumnintnull; while1=1beginupdatetop (100000) myTablesetmyNewColumn=myOldColumnwheremyNewColumnisnull; if @@ROWCOUNT=0break;endaltertablemyTabledropcolumnmyOldColumn;EXECsp_RENAME'[myTable].[myNewColumn]','myOldColumn','COLUMN'...
sp_changearticlecolumndatatype 用于替代受支持的发布服务器类型(Oracle 和 SQL Server)之间的默认数据类型映射。 若要查看这些默认数据类型映射,请执行 sp_getdefaultdatatypemapping。 sp_changearticlecolumndatatype 仅Oracle 发布服务器支持。 针对 SQL Server 发布执行此存储过程会导致错误。 sp_changearticlecolumn...
Assume that you have a table that has a clustered columnstore index in Microsoft SQL Server 2014. You run a DDL query against the table to change the data type of an existing column. For example, you update the
使用SQL Server 管理物件 (SMO) 中的 Column.Collation 屬性。 無法變更目前由下列任何一個項目參考的資料行定序: 計算資料行 索引 分布統計資料,不論是自動產生或由 CREATE STATISTICS 陳述式生成 檢查條件約束 外鍵約束 當您使用 tempdb時, COLLATE 子句會包含 database_default 選項,將暫存資料表中...
Occasionally, it is useful to join change data with other information gathered about the transaction when it committed at the source. The tran_begin_lsn column in the table cdc.lsn_time_mapping provides the information needed to perform such a join. When the update of the source occurs, the...
column_name 指定主鍵數據行或資料行的名稱。 您可以依任何順序指定多個資料行名稱。 value 這是主鍵的值。 如果有多個主鍵數據行,則必須以與數據行出現在 column_name 清單中的順序相同來指定值。 [ FORCESEEK ] 適用於:SQL Server(從 SQL Server 2016 (13.x) SP2 CU16、SQL Server 2017 (14.x) CU24 和...
column_id Is the ID of the column that is being checked. The column ID can be obtained by using the COLUMNPROPERTY function. change_columns Is the binary data from the SYS_CHANGE_COLUMNS column of the CHANGETABLE data. Return Type bit Return Values CHANGE...
In synthetic workload 1, we filled this column in the INSERT command so no update would happen in the trigger. In synthetic workload 4, the column value was not filled, so the trigger updated the row immediately after insert (within the same transaction). This resulted in three rows instea...
Azure SQL Database Azure SQL Managed Instance Analytics Platform System (PDW) You can change the order of columns inTable Designerin SQL Server Management Studio (SSMS). By default, a safety mechanism of SSMS blocks changing the column order. Though it isn't recommended, you can change the ...
You use the Always Encrypted feature of Microsoft SQL Server to encrypt a column in a table. You enable the change data capture (CDC) feature for this table. The encrypted column is not included in thecaptured column list. In this scenario, when you try to use thesp_cdc_di...