You can't use an aggregate in an UPDATE query, for starters - though you didn't include the error message in your original question, I suspect that's what it's telling you.
You'll need to calculate the aggregate before your update and store the results in a temp table, and then join to that table to do your update. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 11 years, 8 months ago. Active 1 year, 8 months ago.
Viewed 96k times. Total and s. Total Do anyone knows how can I solve this problem having good performance. ALL is the default and is implicit. It is also only allowed in the backwards compatible syntax. This example uses AdventureWorks.
The following example retrieves the number of employees for each City from the Address table joined to the EmployeeAddress table. The following example finds the total amount for all sales on each day. One row containing the sum of all sales is returned for each day. If, within each OrderDateKey group, there are subgroups that can be differentiated by DueDateKey , a new grouping will be defined for the result set.
Only those groups with order dates in or later will be included in the results. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode.
Is this page helpful? During this time, there will be no readable replicas for any of these databases. Downtime after the initial failover will depend on the number of databases in the Availability Group. If you plan on failing back to the original primary, this step will not be repeated when you fail back. This article limits the discussion to the upgrade of SQL Server itself. Upgrading the Windows operating system hosting the failover cluster is not supported for operating systems before Windows Server R2.
Choose a database engine upgrade method : To upgrade in the correct order, select the appropriate upgrade method and steps based on your review of supported version and edition upgrades and also based on other components installed in your environment. Plan and test the database engine upgrade plan : Review the release notes and known upgrade issues, the pre-upgrade checklist, and develop and test the upgrade plan.
If additional software is required, install it on each node before you begin the upgrade process to minimize any downtime. Check if change data capture or replication is used for any AG databases : If any databases in the AG are enabled for change data capture CDC , complete these instructions. Mixing versions of SQL Server instances in the same AG is not supported outside of a rolling upgrade and should not exist in that state for extended periods of time as the upgrade should take place quickly.
The other option for upgrading SQL Server and later is through the use of a distributed availability group. Observe the following guidelines when performing server upgrades or updates in order to minimize downtime and data loss for your AGs:. Always upgrade the remote secondary replica instances first, then local secondary replica instances next, and the primary replica instance last.
Backups cannot occur on a database that is in the process of being upgraded. Prior to upgrading the secondary replicas, configure the automated backup preference to run backups only on the primary replica. During a version upgrade, no replicas are readable or available for backups. During a non-version upgrade, you can configure automated backups to run on secondary replicas prior to upgrading the primary replica.
During a version upgrade, readable secondaries cannot be read after an upgrade of the readable secondary and before either the primary replica is failed over to an upgraded secondary or the primary replica is upgraded. To prevent the AG from unintended failovers during the upgrade process, remove availability failover from all synchronous-commit replicas before you begin.
Do not upgrade the primary replica instance before failing over the AG to an upgraded instance with a secondary replica first. Otherwise, client applications may suffer extended downtime during the upgrade on the primary replica instance. Always fail over the AG to a synchronous-commit secondary replica instance. Remove From My Forums.
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