1.语法:ALTER TABLE 表名 ADD CONSTRAINT 主键名 PRIMARY KEY 表名(主键字段); 3.添加外键 1.语法:ALTER TABLE 表名 ADD CONNSTRAINT 外键名 FOREIGN KEY(外键字段) REFERENCES 关联表名(关联字段); 4.插入单(多)条数据记录(和SQL Server相同,但是不能用select多列添加数据) 1.INSERT INTO 表名[(字段名...
方法一、使用add constraint 方法添加主键约束 alter table 表名 add constraint 主键名 primary key (列名1,列名2,...) 方法二、使用索引创建主键 (和方法一没有区别,可以将方法一理解为省略了using index) alter table 表名 add constraint 主键名 primary key (列名1,列名2,...) using index [index_name...
Description Adding primary key column in older versions of Oracle and in 12c Area SQL General / DDL Contributor Andrew Clarke Created Tuesday December 26, 2017 Statement 1 create table t23 (EMP_NAME varchar2(20), EMP_POS varchar2(20), SALARY number, GENDER varchar2(1)) Table created...
要实现两个数据库之间的实时同步,需要给Oracle设置参数 ALTERDATABASEADDSUPPLEMENTALLOGDATA;--执行了12小时,等待数据库中的其它事务都提交以后才执行完成ALTERDATABASEADDSUPPLEMENTALLOGDATA (PRIMARYKEY) COLUMNS;ALTERDATABASEADDSUPPLEMENTALLOGDATA (UNIQUE) COLUMNS; 遇到的问题 在执行第一条命令的时候,等待超过12小时...
1.添加PRIMARY KEY(主键索引) [sql]view plain copy print ? mysql>ALTER TABLE `table_name` ADD PRIMARY KEY ( `column` ) 1. 2.添加UNIQUE(唯一索引) [sql]view plain copy print ? mysql>ALTER TABLE `table_name` ADD UNIQUE ( `column` ...
SQL ServerSQL Server Native Client OLE DB 访问接口SQLNCLISQL Server 的网络名称(对于默认实例)“数据库名称”(可选) SQL ServerSQL Server Native Client OLE DB 访问接口SQLNCLIservername\instancename(针对特定实例)“数据库名称”(可选) Oracle,版本 8 及更高版本Oracle Provider for OLE DB任意O...
//lists.mysql.com/commits/1309663313 Jimmy Yang 2011-02-10 Merge a fix forBug #53756ALTER TABLE ADD PRIMARY KEY affects crash recovery This was already pushed to mysql-5.1-innodb some time ago (revision id jimmy.yang@oracle.com-20100907054137-tpuior7hez4f5ghl) but it was not merged to ...
Enter the SQL query that would be executed in the autonomous data warehouse and return a value that you can use in the reports. For example, if you want to get the Exchange Rate Type that is defined in Oracle Fusion Analytics Warehouse into a session variable, then you can use the follow...
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SQL> ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY) COLUMNS;SQL> ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (UNIQUE) COLUMNS;SQL> ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (FOREIGN KEY) COLUMNS;SQL> ALTER SYSTEM SWITCH LOGFILE;(Optional) Add Oracle DDL replication support 4） ...