Sql Server索引重建

公司线上数据有几千万数据，有时候索引碎片会导致索引达不到我们的预期查询效率，这个时候将索引重建将会提升一定效率，不过重建的时候一定得晚上用户少的时候，索引重建需要一定时间。

直接贴自动重建索引脚本吧

 DECLARE @Database VARCHAR(255);
 DECLARE @Table VARCHAR(255);
 DECLARE @cmd NVARCHAR(500);
 DECLARE @fillfactor INT;
 SET @fillfactor = 90;
 DECLARE DatabaseCursor CURSOR
 FOR
     SELECT  name
     FROM    master.dbo.sysdatabases
     WHERE   name IN ( 'ChemicalInfo_ALLFULL_New' )
     ORDER BY 1;
 OPEN DatabaseCursor;
 FETCH NEXT FROM DatabaseCursor INTO @Database;
 WHILE @@FETCH_STATUS = 0
     BEGIN
         SET @cmd = 'DECLARE TableCursor CURSOR FOR SELECT ''['' + table_catalog + ''].['' + table_schema + ''].['' +
   table_name + '']'' as tableName FROM [' + @Database
             + '].INFORMATION_SCHEMA.TABLES
   WHERE table_type = ''BASE TABLE''';
    -- create table cursor
         EXEC (@cmd);
         OPEN TableCursor;
         FETCH NEXT FROM TableCursor INTO @Table;
         WHILE @@FETCH_STATUS = 0
             BEGIN
                 IF ( @@MICROSOFTVERSION / POWER(2, 24) >= 9 )
                     BEGIN
            -- SQL 2005 or higher command
                         SET @cmd = 'ALTER INDEX ALL ON ' + @Table
                             + ' REBUILD WITH (FILLFACTOR = '
                             + CONVERT(VARCHAR(3), @fillfactor) + ')';
                         EXEC (@cmd);
                     END;
                 ELSE
                     BEGIN
           -- SQL 2000 command
                         DBCC DBREINDEX(@Table,' ',@fillfactor);
                     END;
                 FETCH NEXT FROM TableCursor INTO @Table;
             END;
         CLOSE TableCursor;
         DEALLOCATE TableCursor;
         FETCH NEXT FROM DatabaseCursor INTO @Database;
     END;
 CLOSE DatabaseCursor;
 DEALLOCATE DatabaseCursor;