...表在ArcCatalog中打开目录如下图所示: ? ?...false); int fieldindex = pTable.FindField("JC_AD");//根据列名参数找到要修改的列 IRow row =...= "X";//新值,可以根据需求更改,比如字符串部分拼接等。 9.5K30 Element-ui中Table表中el-table-column列数据的布尔值回填...
SQLite CREATE TABLE 语句: CREATE TABLE table_name(column1 datatype,column2 datatype,column3 datatype,...columnN datatype,PRIMARY KEY(oneormore columns)); SQLite CREATE TRIGGER 语句: CREATE TRIGGER database_name.trigger_name BEFORE INSERT ON table_name FOR EACH ROWBEGINstmt1;stmt2;...END;...
SQLite CREATE TABLE 语句: CREATE TABLE table_name(column1 datatype,column2 datatype,column3 datatype,...columnN datatype,PRIMARY KEY(oneormore columns)); SQLite CREATE TRIGGER 语句: CREATE TRIGGER database_name.trigger_name BEFORE INSERT ON table_name FOR EACH ROWBEGINstmt1;stmt2;...END;...
{ row[i] = reader[i].ToString(); } results.Add(row[0]); } return results; } public List<string[]> FindTableField(string table) { SQLiteCommand command = new SQLiteCommand("PRAGMA table_info(" + table + ")", connection); SQLiteDataReader reader = command.ExecuteReader(); List<...
c.execute("UPDATE employees SET deleted = 1 WHERE id = 2") # 提交更改 conn.commit() # 查询未删除的行 c.execute("SELECT * FROM employees WHERE deleted = 0") rows = c.fetchall() for row in rows: print(row) # 关闭数据库连接 ...
importsqlite3# 连接到SQLite数据库conn = sqlite3.connect('example.db')# 设置Row工厂,以便查询结果返回字典conn.row_factory = sqlite3.Row cursor = conn.cursor()# 执行查询cursor.execute("SELECT * FROM users")# 获取查询结果,现在每一行都是一个字典rows = cursor.fetchall()forrowinrows:print(row...
删除表: drop table 表名; 插入数据: insert into 表名 values(, , ,) ; 创建索引: create [unique] index 索引名on 表名(col….); 删除索引: drop index 索引名(索引是不可更改的,想更改必须删除重新建) 删除数据: delete from 表名; 更新数据: update 表名 set 字段=’修改后的内容’ where 条件...
SQLite.swift use Expression replece 'where' SQL when you execute update and select SQLs. Complex Expression to look for filtering-rows Deleting Rows //1. Delete one row try? product.delete() //2. Delete all rows try? Product.deleteAll() //3. Delete by Expression and chains. try? Prod...
c.execute("UPDATE COMPANY set SALARY = 25000.00 where ID=1") conn.commit() print "Total number of rows updated :", conn.total_changes cursor = conn.execute("SELECT id, name, address, salary from COMPANY") for row in cursor: print "ID = ", row[0] print "NAME = ", row[1] prin...
对大部分数据库来说,大体可以看做是一个较大的Excel文件。数据库中TABLE(表)的概念,对应Excel中Sheet;数据库中row(行)、column(列)的概念,对应Excel的行(被标记为1234的那些)和列(被标记为ABCD的那些)的概念。 数据库常用的六个操作,建表、丢表(删除表)、增、删、改、查,其SQL语句如下所示。