GET /api/v2/instances/{instanceId}/tenantCreateConstraints 请求参数 Query 名称类型是否必选描述示例值 instanceId String 是 OceanBase 集群 ID。 ob317v4uif*** tenantId String 是 租户ID。 t33h8y08k*** tenantMode string 是 租户模式。 当前支持 Oracle 模式(Oracle)、MySQL 模式(MySQL)。 Oracle...
In tablespaces with manual segment-space management, for objects other than tablespaces and rollback segments, specify the number of free lists for each of the free list groups for the table, partition, cluster, or index. The default and minimum value for this parameter is 1, meaning that eac...
Create a table with constraints Now, let us understand how we can create a table with a constraint. A table can have the following constraints. NOT NULL: This constraint ensures that a query does not insert a NULL value in a column on which the constraint has been created. UNIQUE: This ...
After creating a table, you can define additional columns, partitions, and integrity constraints with the ADD clause of the ALTER TABLE statement. You can change the definition of an existing column or partition with the MODIFY clause of the ALTER TABLE statement. See Also: Oracle Database ...
Delete Table in Oracle Constraints Types of Tables in Oracle Components of a Table The components of a database table include columns, rows, and cells, which collectively organize and store data in a structured manner: Columns (Fields):Each column in the saved data represents different aspects ...
当一个类型化的表被创建时,列的数据类型由底层的组合类型决定而没有在CREATE TABLE命令中直接指定。但是CREATE TABLE命令可以对表增加默认值和约束,并且可以指定存储参数。 column_name列的名称会在新表中被建立. data_type列的数据类型. 这可以包括数组规格。 COLLATE collationCOLLATE子句为该列(必须是一种可排序数...
Data in the temporary table is visible only to the current session. Note that this is incompatible with Oracle databases. The default value for Oracle databases is DELETE ROWS. DELETE ROWS: A transaction-level temporary table retains data until the COMMIT or ROLLBACK command is run. The data ...
SQL Create Table Syntax The syntax for the SQL create table statement is: CREATE[schema_name.]table_name(column_name data_type[NULL|NOTNULL][inline_constraint][DEFAULTdefault_value],...out_of_line_constraints); The parameters or values mentioned in this syntax are: ...
To create a customer table with the fields specified in the second paragraph above, we would type inCREATE TABLE Customer (First_Name char(50), Last_Name char(50), Address char(50), City char(50), Country char(25), Birth_Date datetime);No constraints were specified in the above SQL ...
In Oracle and SQL Server CREATETABLECompanies (idintNOTNULLPRIMARYKEY,namevarchar(50), addresstext, emailvarchar(50), phonevarchar(10) ); To learn more, visitSQL PRIMARY KEY. Define constraints while creating a table We can also add different types of constraints while creating a table. For ...