db.CodeFirst.InitTables(typeof(T));//具体用法看文档迁移 3.3 创建视图 5.1.4.106-preview22+ //方式1:通过无实体查询方式创建视图 var sql=db.Queryable<object>().AS("表名").ToSqlString(); var name = "view01"; db.Ado.ExecuteCommand($"create view {name} as \r\n"+sql); //方式2: ...
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 Oracle SQL Oracle has several different built-in views that you can query to f...
它调用了MappedStatement对象的getBoundSql方法,便得到了带有别名的sql字符串,也就是说,这个getBoundSql方法形成了这段sql字符串,debug进去看看 5、mybatis plus别名自动设置的逻辑 debug ms.getBoundSql方法,最终到了方法:org.apache.ibatis.scripting.xmltags.MixedSqlNode#apply,该方法入参是org.apache.ibatis.scripti...
INTO OUTFILE 'd:/tmp/test_db_all_tables.xls';-- 把表名都导进excel里了，方便进行各种查看...效果图:自己写 SQL， 用 LIMIT 处理吧。mysql> SELECT table_name, table_type, engine-> FROM information_schema.tables-> WHERE table_schema = 'test'-> ORDER BY table_name ...
SQL语句之SHOW语句 SHOW DATABASES – 显示当前所有数据库的名称 mysql> SHOW DATABASES; 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) Mysql> SHOW TABLES; SHOW TABLES FROM db_name – 显示数据库中的所有表
Database changed mysql> SHOW TABLES; +---+ | Tables_in_mysql | +---+ | columns_priv | | db | | engine_cost | | event | | func | | general_log | | gtid_executed | | help_category | | help_keyword | | help_relation | | help_topic | | innodb_index_stats | | innodb_t...
在Hive中,show tables命令的作用是什么? show命令在SQL中的使用频率是非常高的,本文中主要介绍了show的几个常用方法 Show Command Show Databases SHOW DATABASES or SHOW SCHEMAS lists all of the databases defined in the metastore. The uses of SCHEMAS and DATABASES are interchangeable – they mean the ...
SHOWTABLES;Code language:SQL (Structured Query Language)(sql) Unfortunately, Oracledoes notdirectly support theSHOW TABLEScommand. However, you can list all tables in a database by querying from various data dictionary views. Show tables owned by the current user# ...
When willSHOW TABLES be available in PostgreSQL? I would say never! First, theSHOWcommand has its own semantics in PostgreSQL. Second, it's not part of the SQL standard. And probably it never will be, because the standard committee decided to use a different approach, called theInformation ...
hive show tables 详解 hive showroom 一、数据库 1. 创建database create database if not exists db_hive ; create database if not exists db_hive_03 location '/user/root/hive/warehouse/db_hive_03.db'; 2. 查询所有database show databases;...