最近在搞一个升级脚本,发现有一张业务表中的某些字段长度需要调整,直接使用alter table alter column进行修改发现修改一列要用十几分钟!!!两三个列那用时简直不能容忍啊!google了一下,相关链接参考文末stackoverflow问答。 测试环境配置 表中数据量100多万; 虚拟机4核16G内存400G硬盘; 优化步骤 1.删除修改列
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...
SQL Server CDC is the process of recording changes in a Microsoft SQL Server database and then delivering those changes in real-time to a downstream system.
Database Engine Instances (SQL Server) Configure Database Engine Instances Collation and Unicode Support Linked Servers (Database Engine) Logon Triggers Manage the Database Engine Services Server Network Configuration Client Network Configuration Database Engine Scripting Maintenance Plans Resource Governor ...
Learn about change data capture (CDC) in SQL Server and Azure SQL Managed Instance, which records insert, update, and delete activity that applies to a table.
Applies to: SQL Server SQL Server Replication, change data capture (CDC), and change tracking (CT) are supported on Always On availability groups. Always On availability groups helps provide high availability and other database recovery capabilities. Overview of replication with availability groups ...
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Applies to:SQL Server 2008 **Summary:**Change data capture is a new feature in SQL Server 2008 that provides an easy way to capture changes to data in a set of database tables so these changes can be transferred to a second system like a data warehouse. This document provides guidance ...
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 data type for Column_1 of Table_1 from VARCHAR (499) to ...
On the next page of the wizard, clickChange Database. In theSelect Data Sourcedialog box, clickNew Source. In theWhat kind of data source do you want to connect tolist, clickMicrosoft SQL Server, and then clickNext. In theServer namebox, ...