另外,將表格空間的 AUTORESIZE 設為 NO。請注意,停用自動調整大小將導致 MAXSIZE 和 INCREASESIZE 的現行值遺漏。 如果執行 SET TABLESPACE CONTAINERS 指令,請指定一組儲存器,其大小總計必須小於或等於表格空間的大小上限。 sqlcode:-20325 sqlstate:54047...
Nonkey columns can't be changed, except to do the following: Change the nullability of the column from NOT NULL to NULL. Increase the length of varchar, nvarchar, or varbinary columns. Note These column modification restrictions also apply to index key columns.Design...
SELECT name, TYPE_NAME(system_type_id), max_length, precision, scale FROM sys.columns WHERE object_id = OBJECT_ID(N'dbo.doc_exy') ; GO -- Increase the size of the varchar column. ALTER TABLE dbo.doc_exy ALTER COLUMN col_a varchar(25) ; GO -- Increase the scale and precision of...
SELECT name, TYPE_NAME(system_type_id), max_length, precision, scale FROM sys.columns WHERE object_id = OBJECT_ID(N'dbo.doc_exy') ; GO -- Increase the size of the varchar column. ALTER TABLE dbo.doc_exy ALTER COLUMN col_a varchar(25) ; GO -- Increase the scale and precision of...
Nonkey columns can't be dropped from a table unless that table's index is dropped first. Nonkey columns can't be changed, except to do the following: Change the nullability of the column from NOT NULL to NULL. Increase the length of varchar, nvarchar, or varbinary columns.SecurityPermissio...
Increase ROWSCNT to high value, say 10000. * * 2. Remove all the DISPLAY statements, usually which comsumes * * significant portion of the total program execution time. * *** IDENTIFICATION DIVISION. PROGRAM-ID. stmtcache. ENVIRONMENT DIVISION. CONFIGURATION SECTION. DATA DIVISION. WORKING-STO...
The Database Engine supports several data types that can hold large strings up to 2 gigabytes (GB) in length, such as: nvarchar(max), varchar(max), varbinary(max), ntext, text, and image. Large data stored using these data types are stored in a series of data fragments that are lin...
For example, you can increase the length of a VARCHAR2 or RAW attribute, or you can increase the precision or scale of a numeric attribute. Restriction on Modifying Attributes You cannot expand the size of an attribute referenced in a function-based index, domain index, or cluster key. [...
Azure SQL Database doesn't permit the ONLINE option when the base table contains varchar(max) or varbinary(max) columnsFor more information, see How Online Index Operations Work.The following XEvents are related to ALTER TABLE ... SWITCH PARTITION and online index rebuild....
数据库SQL语言参考: VARCHAR2 Data Type The VARCHAR2 data type specifies a variable-length character string. When you create a VARCHAR2 column, you supply the maximum number of bytes or characters of data that it can hold. Oracle subsequently stores each value in the column exactly as you spec...