SQL Server: It is not possible to rename a column using the ALTER TABLE statement in SQL Server. Use sp_rename instead. The resulting table structure is: Table Customer Column Name Data Type First_Name char(50) Last_Name char(50) Addr char(50) City char(50) Country char(25...
Learn more about the Microsoft.SqlServer.TransactSql.ScriptDom.AlterTableAlterColumnStatement.AlterTableAlterColumnStatement in the Microsoft.SqlServer.TransactSql.ScriptDom namespace.
OldColumn1INT)-- 从旧表复制数据INSERTINTONewTable(NewColumn1,NewColumn2,OldColumn1)SELECTOldColumn1,OldColumn2,OldColumn1FROMOldTable-- 删除旧表,并重命名新表DROPTABLEOldTableEXECsp_rename'NewTable','OldTable'
, language: 'sql', // 语言类型 tabCompletion: 'on', cursorSmoothCaretAnimation: true, formatOnPaste: true, mouseWheelZoom: true, folding: true, //代码折叠 autoClosingBrackets: 'always', autoClosingOvertype: 'always', autoClosingQuotes: 'always', automaticLayout: 'always' }) } } </script...
(111,’wg’,’121’,’dd’) ; 删: mysql> drop table tablename; mysql> truncate tablename; 快速删除表数据,自增长id从头在来,快速,从磁盘直接删除,不可恢复 mysql> delete from student; 删除整个表的数据,自增长继续 改: mysql> alter table oldtable rename newtable; 改表名 mysql> alter table...
Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 The options for alter column version of alter table statement. AddRowguidcol, DropRowguidcol can only happen if there is no DataType. C# Copier public enum AlterTableAlt...
ScriptDom Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 The options for alter column version of alter table statement. AddRowguidcol, DropRowguidcol can only happen if there is no DataType. C# Kopiatu public enum...
ScriptDom Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 The options for alter column version of alter table statement. AddRowguidcol, DropRowguidcol can only happen if there is no DataType. C# Copiar public enum ...
LOCATION 是指定外部表的存储路径,MANAGEDLOCATION 是指定管理表的存储路径(hive 4.0.0 才支持),官方建议默认就行,让所有的表都在一个根目录下。 例子 代码语言:javascript 代码运行次数:0 运行 AI代码解释 create database myhive;create databaseifnot exists myhive; ...
hivesqlrename列名 hive rename table 二、HIVE 基本操作 2.1 create table 总述 CREATE TABLE 创建一个指定名字的表。如果相同名字的表已经存在,则抛出异常;用户可以用 IF NOT EXIST 选项来忽略这个异常。 EXTERNAL 关键字可以让用户创建一个外部表,在建表的同时指定一个指向实际数据的路径(LOCATION)。