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...
Scope of rows: all columns in all tables in a database Ordered by schema, table name, column id Sample results You could also get this Get this interactive HTML data dictionary in minutes with Dataedo. See live HTML data dictionary sample Try for free Create beautiful and useful documentation...
SQLColumns() returns a list of columns in the specified tables. The information is returned in an query result set, which can be retrieved with the same functions that are used to fetch a result set generated by a SELECT statement.
任何< 语句的 >select_listSELECT。 这包括子查询的 SELECT 列表和 SELECT 语句内的 INSERT 列表。 SELECT 语句中出现的子查询 IF 语句。 查询的 TOP、TABLESAMPLE、HAVING、GROUP BY、ORDER BY、OUTPUT...INTO 或FOR XML 子句。 OPENROWSET、 OPENQUERY、 OPENDATASOURCE、 OPENXML或任意 FULLTEXT 运算符的参数(...
ALTER TABLE modifies a table definition by altering, adding, or dropping columns and constraints. ALTER TABLE also reassigns and rebuilds partitions, or disables and enables constraints and triggers.
Applies to: SQL Server 2012 (11.x) and later. Creates the new table as a FileTable. You don't specify columns because a FileTable has a fixed schema. For more information, see FileTables. column_name AS computed_column_expression An expression that defines the value of a computed column...
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 retrieve a result set generated by a ...
假设要求在企业信息平台数据库EAMS中创建数据表clCommunicationsList,如表1所示,表示个人的通信录信息,包括通信录ID、类别、人员ID、通信录人员姓名、性别、人员编码、Email地址、办公室电话、办公室传真、移动电话、地址等信息。表1 clCommunicationsList表结构
The Database Engine uses the following mechanisms to ensure the integrity of transactions and maintain the consistency of databases when multiple users are accessing data at the same time: Locking Each transaction requests locks of different types on the resources, such as rows, pages, or tables,...