EN问题是表ALL_TAB_COLUMNS没有单列主键。您应该使用基于OWNER、TABLE_NAME、COLUMN_NAME列的复合主键。
视图ALL_TAB_COLS与ALL_TAB_COLUMNS的区别在于:ALL_TAB_COLS会展示快速删除的列,而ALL_TAB_COLUMNS不会展示快速删除的列。 功能适用性 该视图仅适用于 OceanBase 数据库 Oracle 模式。 字段说明 字段名称类型是否可以为 NULL描述 OWNERVARCHAR2(128)NO表、视图的拥有者 ...
Get all table columns get /database/objects/columns/Returns all records from DBA_TAB_COLUMNS or ALL_TAB_COLUMNS view depending on role at runtime. Records included in the response describes the columns of all tables, views, and clusters that the role has access to. A client requires ...
视图ALL_TAB_COLS 与ALL_TAB_COLUMNS 的区别在于:ALL_TAB_COLS 会展示快速删除的列,而 ALL_TAB_COLUMNS 不会展示快速删除的列。功能适用性 该视图仅适用于 OceanBase 数据库 Oracle 模式。字段说明字段名称类型是否可以为 NULL描述 OWNER VARCHAR2(128) NO 表、视图的拥有者 TABLE_NAME VARCHAR2(128) NO 表...
问Oracle查询all_tab_columns.data_default (类型为LONG)EN在mbatis中使用Xml配置sql语句时，出现了这样...
ALL_TAB_COL_STATISTICS displays column statistics and histogram information extracted from ALL_TAB_COLUMNS.
(B)all columns with character datatypes in Oracle database Query A. All columns with character datatypes accessible to the current user select owner as schema_name, table_name, column_id, column_name, data_type, data_length from sys.all_tab_cols where data_type in ('CHAR', 'VARCHAR', ...
dba_cons_columns: provides information about the column of all constraints in the database and requires DBA privileges. We can use the view according to the access we have to the Oracle database. Now I am going to explain how to check all constraints on a table in Oracle using the exampl...
SELECT TABLE_NAME,TO_NUMBER(EXTRACTVALUE(XMLTYPE(DBMS_XMLGEN.GETXML('SELECT COUNT(*) CNT FROM '||TABLE_NAME)),'/ROWSET/ROW/CNT')) AS C
单表Insert into的语句就不说了,这里主要说插入多条语句的说明 For a multitable insert operation, each expression in the values_clause must refer to columns returned by the sele