In SQL Server 2008, there is no internal indicator to suggest to the synchronization threads that the refreshed database schema design has or has not been altered, compared with the existing database schema design. Therefore, each synchronization truncates the OlapQueryLog table. Usuall...
Assume that the stored procedure is called concurrently from multiple instances. Then the temporary tables are created and dropped frequently, that will lead to frequent creation and deletion of the corresponding records for the ...
This lesson shows you how to create a database, create a table in the database, and then access and change the data in the table. Because this lesson is an introduction to using Transact-SQL, it doesn't use or describe the many options that are available for these statements. ...
确定占用最多资源的查询是所有数据库性能优化工作的第一步。 在旧版 SQL Server 中,这需要大量的跟踪和一系列复杂的 SQL 脚本,这可能会导致数据收集过程变得繁琐。 识别有问题的查询 Azure SQL 数据库提供了名为“查询性能见解”的工具,管理员可以通过该工具快速识别成本高昂的查询。 可以在 Azure SQL 数...
In SQL Server a query plan is called anexecution plan. Parts of an Execution Plan There are several parts of an execution plan worth mentioning. First, each plan is made up of one or more execution steps. These steps describe the database operations taken to create the query results. It ...
Thus, most of the principles that follow describe the ways that you can reference individual data columns within an aggregate query. In This Section Work with Columns in Aggregate Queries (Visual Database Tools) Describes concepts about grouping and summarizing columns with the GROUP BY, WHERE, ...
Insert, update, and delete table data in a spreadsheet like format. Find and replace data, preview generated SQL, and more.Compare table data across databases, or compare the results of queries. Additional Information RazorSQL is a software application that provides both easy to use visual tools...
requested in the SQL batch. For instance a query plan will describe an access path like'open index idx1 on table t, locate the row with the key 'k' and return the columns a and b'. As a side note: a common mistake done by developers is trying to come up with a single T-SQL ...
2.1.2.235 T472, DESCRIBE CURSOR 2.1.2.236 T491, LATERAL derived table 2.1.2.237 T495, Combined data change and retrieval 2.1.2.238 T502, Period predicates 2.1.2.239 T511, Transaction counts 2.1.2.240 T521, Named arguments in CALL statement 2.1.2.241 T522, Default values for IN par...
TheCustomer class now has a property that declares the relationship between customers and their orders. TheOrders property is of typeEntitySet because the relationship is one-to-many. We use theOtherKey property in theAssociation attribute to describe how this association is done. It specifies the...