數據庫創建的操作及使用

Steps: 1. 數據庫創建及查詢; 命令: 創建數據庫:create database demo_db; 查詢所有已經存在的數據庫:show databases; 2. 刪除數據庫(慎重使用,刪除不可恢復); 命令: drop database drop_demo_db ...

Mon Jul 12 00:49:00 CST 2021 0 155
SQLite數據庫是否存在

SQLite語句: cmd.CommandText = "SELECT count(*) from sqlite_master where type='table' and name='tableName'; int a= Convert.ToInt32(cmd.ExecuteScalar ...

Thu May 28 02:13:00 CST 2015 1 2969
sqlite 查看數據庫和字段

查看所有名: select name from sqlite_master where type='table' order by name; 查看表的字段: PRAGMA table_info([tablename]); tablename 為實際 ...

Tue Jul 23 23:22:00 CST 2019 0 3288
 
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