SQL Server真是越来越有看头。当我们还在为Linux上运行 SQL Server 而兴奋的时候,SQL Server 已经开启了容器化之路,至此才能看清微软的胸怀,开始拥抱更大的世界。当我越来越深入去阅读有关Docker容器的文档,已然发现曾经部署上千台 LinuxMySQL的场景,如今在 Docker 的帮助下,SQL Server 也是手到擒来。如果 SQL Ser...
When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' isn't specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any char...
When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' is not specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any cha...
When referencing the Unicode character data types nchar, nvarchar, and ntext, 'expression' should be prefixed with the capital letter 'N'. If 'N' isn't specified, SQL Server converts the string to the code page that corresponds to the default collation of the database or column. Any char...
Starting with SQL Server 2022 (16.x), you can prevent unauthorized access to sensitive data and gain control by masking it to an unauthorized user at different levels of the database. You can grant or revoke UNMASK permission at the database-level, schema-level, table-level or at the ...
A column prefix that specifies the value deleted by the update or delete operation, and any existing values that don't change with the current operation. Columns prefixed with DELETED reflect the value before the UPDATE, DELETE, or MERGE statement is completed....
Global temporary tables in SQL Server (table names prefixed with ##) are stored in tempdb and shared among all user sessions across the entire SQL Server instance. Azure SQL Database supports global temporary tables that are also stored in tempdb but are scoped to the database level. This ...
In more detail, SQL Server creates thehistogramfrom the sorted set of column values in three steps: Histogram initialization: In the first step, a sequence of values starting at the beginning of the sorted set is processed, and up to 200 values ofrange_high_key,equal_rows,range_rows, and...
Histograms in SQL Server are only built for a single column-the first column in the set of key columns of the statistics object. To create the histogram, the Query Optimizer sorts the column values, computes the number of values that match each distinct column value, and then aggregates the...
前端支持Rest和Hive Server2,对Java开发人员和SQL Boy们都很友好。 HS2Endpoint 有点区别: 优势 尤其是处理异构数据源: 优势很明显。做联邦查询的改动也只是需要+个Catalog。 Demo FFA2022的罗宇侠&方盛凯两位大佬带来个Demo,展示了Flink如何使用Hive和Flink的dialect分别按流式和批式跑任务。