table_name- table name column_id- table column id, starting at 1 for each table column_name- name of column data_type- column data type max_length- data type max length precision- data type precision Rows One rowrepresents one table column Scope of rows:all columns in all tables in a ...
select*fromall_tab_columns--查询所有用户的表的列名等信息。select*from[user]_tab_columns--查询本用户的表的列名等信息。---查询所有表名:selectt.table_namefromuser_tables t;---查询所有字段名:selectt.column_namefromuser_col_comments t;---查询指定表的所有字段名:selectt.column_namefromuser_col_...
get MIN date from all tables and columns Get MIN of Login time and MAX of logout time in sql server. Get Nth column in a table Get only first 2 digits from integer Get only Numeric values from string with alphanumeric values in SQL Get Previous Business day using custom Holiday table...
select * from all_tables; --所有的表对象信息 select * from all_indexes; --所有的数据库对象索引的信息 select * from all_tab_comments; --查询所有用户的表,视图等 select * from all_col_comments; --查询所有用户的表的列名和注释. select * from all_tab_columns; --查询所有用户的表的列名等...
其中Collection<String>参数在几种分片策略中使用一致,在分库时值为所有分片库的集合databaseNames,分表时为对应分片库中所有分片表的集合tablesNames;PreciseShardingValue为分片属性,其中logicTableName为逻辑表,columnName分片健(字段),value为从 SQL 中解析出的分片健的值。
表格選項是一個鍵值對,您可以在執行CREATE TABLE時進行初始化。 您無法SET或UNSET資料表選項。 TBLPROPERTIES 在新數據表或檢視中設定一或多個數據表屬性。 您可以使用資料表屬性來標記數據表,其中包含 SQL 未追蹤的資訊。 語法 TBLPROPERTIES ( { property_key [ = ] property_val } [, .....
LIST SHOW ALL IN SHARE SHOW CATALOGS SHOW COLUMNS SHOW CONNECTIONS SHOW CREATE TABLE SHOW CREDENTIALS SHOW DATABASES SHOW FUNCTIONS SHOW GROUPS 顯示位置 SHOW PARTITIONS SHOW PROVIDERS SHOW RECIPIENTS SHOW SCHEMAS SHOW SHARES SHOW SHARES IN PROVIDER SHOW TABLE EXTENDED SHOW TABLES SHOW TABLES DROPPED SHO...
To display the entire record or specific columns from a table, utilize table aliases in SELECT lists and the FROM clause. WHERE, GROUP BY, HAVING, and ORDER BY clauses all support the use of table aliases. When many tables are needed for data, those tables must be joined by qualifying ...
SQLTables() returns a list of table names and associated information stored in the system catalogs of the connected data source. The list of table names is returned as a result set, which can be retrieved using the same functions that are used to retriev
SELECT TABNAME, COLNAME FROM SYSCAT.COLUMNS WHERE SECLABELNAME = '' AND TABNAME = (SELECT TABNAME FROM SYSCAT.TABLES WHERE SECPOLICYID = (SELECT SECPOLICYID FROM SYSCAT.SECURITYPOLICIES WHERE SECPOLICYNAME = '<policy-name>' ) ) sqlcode: -20404 sqlstate:42893SQL20405N 無法捨棄...