QUOTENAME()函数 这个函数和SQL Server对象名组合使用,以将结果传递给表达式。它只用于给输入的字符串加一对方括号,并返回新形成的字符串。 如果参数包含保留的分隔符或者封装字符(比如引号或括号),这个函数将修改字符串,以便SQL Server能将结果字符串中的这类字符当成文本字符。如下面的例子所示,查询的结果如图所示。
The LOG() function returns the natural logarithm of a specified number, or the logarithm of the number to the specified base.From SQL Server 2012, you can also change the base of the logarithm to another value by using the optional base parameter. ...
You create a linked server in Microsoft SQL Server 2016 or 2017 that points to a remote instance of SQL Server 2012 or later versions. You want to use the LOG() function without explicitly specifying the logarithm base (to ...
During the initial stages of a database recovery process, SQL Server discovers all VLFs in all transaction log files, and builds a list of these VLFs. This process can take a long time depending on the number of VLFs present in the specific database. The more VLFs, the longer the...
You can turn report execution logging on or off from the Server Properties page in SQL Server Management Studio. The EnableExecutionLogging is an advanced property.By default, log entries are kept 60 days. Entries that exceed this date are removed at 2:00 A.M. every day....
You set up a query log on the server. You synchronize a database on the server. In this scenario, all records in the query log table are truncated. Note This problem also exists in SQL Server 2008 and in SQL Server 2008 R2. For more information, see the "More Information"...
| log_bin_trust_function_creators | OFF | | log_bin_use_v1_row_events | OFF | | sql_log_bin | ON | +---+---+ 6 rows in set (0.07 sec) 查看binlog文件列表 mysql> show binary logs; +---+---+---+ | Log_name
Error Code: 1418. This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable) 原来是因为在主从复制的两台MySQL服务器中开启了二进制日志选项log-bin,slave会...
This topic describes how to configure log shipping in SQL Server by using SQL Server Management Studio or Transact-SQL. Note SQL Server 2008 (10.0.x) Enterprise and later versions support backup compression. When creating a log shipping configuration, you can control the backup compression behavior...
基于行的复制(row-based replication, RBR),不记录每条sql语句的上下文信息,仅需记录哪条数据被修改了。 优点:不会出现某些特定情况下的存储过程、或function、或trigger的调用和触发无法被正确复制的问题; 缺点:会产生大量的日志,尤其是alter table的时候会让日志暴涨 ...