Each database vendor has a different way of showing tables. Sometimes there is a command, others have aSELECT queryfrom the data dictionary. Let's take a look at a few ways in each database. Show Tables in Oracl
SELECTowner,table_nameFROMDBA_TABLES Listing USER Tables Following is the SQL SELECT statement which will list down all the USER created tables in an Oracle Database. SELECTowner,table_nameFROMUSER_TABLES Listing ALL Views Following is the SQL SELECT statement which will list down all the views...
SQL - Show Tables SQL - Rename Table SQL - Truncate Table SQL - Clone Tables SQL - Temporary Tables SQL - Alter Tables SQL - Drop Table SQL - Delete Table SQL - Constraints SQL Queries SQL - Insert Query SQL - Select Query SQL - Select Into ...
The SQL query below shows a list of tables sorted by the largest tables first. For each table, the indexes in the table are shown. For each index it shows when the index was last used. The query is designed to collect various pieces of information in one place, and give...
show create database mydb; 1. 使用数据库 use mydb; 1. 删除数据库 格式:drop database 数据库名 drop database mydb; 1. 2、DDL之表操作 查看所有表 show tables; 1. 创建表 格式:create table 表名(字段名 数据类型 [约束], 字段名 数据类型 [约束], ...
mysql>selectdatabase();+---+|database()|+---+|db1|+---+1rowinset(0.00sec) 每创建一个表每个字段都有相应类型 int 整数类型 char 字符类型 增:create table t1(id int,name char); 创建的数据库都在 在 /var/lib/mysql目录下 [root@mysql mysql]# cat/etc/my.cnf[mysql...
SHOW TABLES – 显示当前数据库中所有表的名称(需要设置默认数据库use DATABASE_NAME)1 Mysql> SHOW TABLES;SHOW TABLES FROM db_name – 显示数据库中的所有表1 Mysql> SHOW TABLES FROM db_name;SHOW ENGINES - 显示MySQL当前支持哪些存储引擎和默认存储引擎...
SQL分类1) DDL(Data Definition Language)数据定义语言 用来定义数据库对象:数据库,表,列等。关键字:create, drop,alter 等 2) DML(Data Manipulation Language)数据操作语言 用来对数据库中表的数据进行增删改。关键字:insert, delete, update 等 3) DQL(Data Query Language)数据查询语言 用来查询数据库中表的...
Database Database 属性 方法 BeginTransaction CompatibleWithModel Create CreateIfNotExists Delete Equals ExecuteSqlCommand ExecuteSqlCommandAsync Exists GetHashCode GetType Initialize SetInitializer SqlQuery ToString UseTransaction DbConfiguration DbConfigurationTypeAttribute ...
ALTER DATABASE CURRENT SET QUERY_STORE = ON; ALTER DATABASE CURRENT SET QUERY_STORE (QUERY_CAPTURE_MODE = ALL); GO -- Should be READ_WRITE SELECT actual_state_desc FROM sys.database_query_store_options; GO /* You can verify Query Store Hints in sys.query_store_query_hints. Checking ...