视图中不能参考其他视图。 11) 视图定义中的select语句不能包含下述T-SQL元素: Ø COUNTROWSET Ø functions (OPENDATASOURCE, OPENQUERY,OPENROWSET, AND OPENXML) Ø OUTER joins (LEFT, RIGHT, or FULL) Ø Derived table (defined by specifying aSELECT statement in the FROM clause) Ø Self-joins...
创建表和索引 create unique index 索引名 on 表名(列名) 1. 创建索引 drop unique index 索引名 on 表名 1. 删除索引 3.主键索引 主键有两个功能:加速查询 和 唯一约束(不可含null) create table in1( nid int not null auto_increment primary key, name varchar(32) not null, email varchar(64) ...
// Sets the value of the element parameter if the value is in the cache.privateboolIfPageCached_ThenSetElement(introwIndex,intcolumnIndex,refstringelement){if(IsRowCachedInPage(0, rowIndex)) { element = cachePages[0].table .Rows[rowIndex % RowsPerPage][columnIndex].ToString();returntrue;...
// Sets the value of the element parameter if the value is in the cache.privateboolIfPageCached_ThenSetElement(introwIndex,intcolumnIndex,refstringelement){if(IsRowCachedInPage(0, rowIndex)) { element = cachePages[0].table .Rows[rowIndex % RowsPerPage][columnIndex].ToString...
SQL Pane Show 2 more Applies to:SQL Server You can work in the Query and View Designer using the keyboard or the mouse. Refer to the following tables for specific methods. Any Pane ToPressClick Move among the Query and View Designer panesF6, SHIFT+F6Anywhere in the target pane ...
(22) must be equal to the number of rows contained in that section before the update (22), plus or minus the number of rows inserted or deleted from that section (0 inserted, 1 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved...
cachePages[GetIndexToUnusedPage(rowIndex)] = new DataPage(table, rowIndex); return RetrieveElement(rowIndex, columnIndex); } // Returns the index of the cached page most distant from the given index // and therefore least likely to be reused. private int GetIndexTo...
2. We can use a single SQL query to accomplish what we want. Notice that we treat the inline view exactly the same as we treat a table. Comparing Query 2 and Query 3, we see that the only difference is that we replace the temporary table name in Query 2 with the inline view stat...
CHECKDB found 0 allocation errors and 1 consistency errors in table 'sys.syscolpars' (object ID 41) Clone VM That Has SQL Server Installed Cluster network name resource failed registration... Clustered index on a varbinary column Clustered Index Update or Insert Expensive Query Plan Operator Code:...
OTHER_INDEX_SIZE The number of pages on disk that store all secondary indexes for the table. This value might be null if no statistics are collected yet for the table. MODIFIED_COUNTER The number of rows modified by DML operations, such as INSERT, UPDATE, DELETE, and also cascade oper...