最近在搞一个升级脚本,发现有一张业务表中的某些字段长度需要调整,直接使用alter table alter column进行修改发现修改一列要用十几分钟!!!两三个列那用时简直不能容忍啊!google了一下,相关链接参考文末stackoverflow问答。 测试环境配置 表中数据量100多万; 虚拟机4核16G内存400G硬盘; 优化步骤 1.删除修改列关联...
sp_changearticlecolumndatatype 用于替代受支持的发布服务器类型(Oracle 和 SQL Server)之间的默认数据类型映射。 若要查看这些默认数据类型映射,请执行 sp_getdefaultdatatypemapping。 sp_changearticlecolumndatatype 仅Oracle 发布服务器支持。 针对 SQL Server 发布执行此存储过程会导致错误。 sp_changearticlecolumn...
DataType 加密 GeneratedAlways IsHidden IsMasked MaskingFunction 選項 StorageOptions 方法 AlterTableAlterIndexStatement AlterTableAlterPartitionStatement AlterTableChangeTrackingModificationStatement AlterTableConstraintModificationStatement AlterTableDropTableElement AlterTableDropTableElementStatement AlterTabl...
type_name can be: A Microsoft SQL Server system data type. An alias data type based on a SQL Server system data type. Alias data types must be created by using CREATE TYPE before they can be used in a table definition. A Microsoft .NET Framework user-defined type and ...
Edit Column Type ALTERTABLE[Product]ALTERCOLUMN[Name]nvarchar(max); Rename rename table 和 column 是很恐怖的操作. 因为 index, foreign key 都会用 table name 和 column name 命名. 所以它需要批量换 EXECsp_rename'Product','Products';--change table nameEXECsp_rename'Products.Name','NewColumnName'...
type_name can be: A Microsoft SQL Server system data type. An alias data type based on a SQL Server system data type. Alias data types must be created by using CREATE TYPE before they can be used in a table definition. A Microsoft .NET Framework user-defined type and the schema to wh...
Now my target tables(SQL SERVER DB) are now loaded with data.Now I want to change the column data type in target table sql server database from VARCHAR to DATETIME with out interrupting the data.I dont want to drop or delete the table as there is huge data residing in the tables....
ALTER TABLE table_name MODIFY column_name NEW_DATATYPE (7) 修改表字段名称 ALTER TABLE table_name CHANGE old_column_name new_column_name DATATYPE (8) 删除表字段 ALTER TABLE table_name DROP old_column (9) 插入数据 INSERT INTO table_name (column1, column2) VALUES (value1, value2); ...
Applies to: SQL Server 2016 (13.x) and later Azure SQL Database Azure SQL Managed Instance Analytics Platform System (PDW)You can change the order of columns in Table Designer in SQL Server Management Studio (SSMS). By default, a safety mechanism of SSMS blocks changing the column order. ...
without moving data out of the database. The wizard removes all dependencies blocking the schema change of the column to be encrypted. It issues an in-place encryption for each column by using the enclave within the database engine. When the encryption is finished, the wizard recreates the ...