http://developer.azurewebsites.net/2014/09/better-sql-group-by-find-duplicate-data/您可以通过匹配...
duplicateRows('acl', 'users', 'WHERE id = 200', 'created_ts'); -- same as above but will not copy the created_ts column value duplicateRows('acl', 'users', 'WHERE id = 200', 'created_ts,updated_ts'); -- same as above but also omits the updated_ts column duplicateRows('acl...
SELECT DISTINCT city FROM customers; This would return a list of all the unique cities in the customers table. You can also use SQLite select distinct on multiple columns. This can be useful if you want to make sure there are no duplicate rows in your table. SELECT DISTINCT column_1, col...
...02 on duplicate key update 即插入数据时,如果数据存在,则执行更新操作,前提条件同上,也是插入的数据字段设置了主键或唯一索引,测试SQL语句如下,当插入本条记录时,MySQL数据库会首先检索已有数据...03 replace into 即插入数据时,如果数据存在,则删除再插入,前提条件同上,插入的数据字段需要设置主键或唯一索引,...
SQLSelect(数据库, 数据表[, 字段名[, 条件]]) 参数 参数数据类型解释 数据库 字符串 数据库的文件路径 数据表 字符串 要操作的表名 字段名 字符串 可选参数,要查询的字段名,省略默认为获取所有字段 条件 字符串 可选参数,要查询的过滤条件,语法参照sqlite语法 返回值 表 ,返回查到的结果。 示例 复制 ...
How to find the parent window of a Dialog? How to find the rows (ListViewItem(s)) in a ListView that are actually visible? How to find the xy coordinate of an element in a pixel array ? How to find whether the cursor in inside the rectangle or not ? How to Fire an event in ...
SQLite remove duplicate itemsThe DISTINCT clause is used to select only unique items from the result set. sqlite> SELECT Customer FROM Orders WHERE Customer LIKE 'B%'; Customer --- Brown Black Brown This time we have selected customers whose names begin with B. We can see that Brown appears...
If you generate a million numbers per second for 82,000 years, it is less than 1% likely that you will have found a duplicate. Fortunately, SQLite has a built-in random number generator which is of cryptographic quality. We can use it to generate 16 bytes of random data and convert that...
/**< driver can insert data into database and update on duplicate */ DB_CAP_MULTIPLE_INSERT = 1 << 9 /**< driver can insert multiple rows at once */ } db_cap_t; /** * All database capabilities except raw_query, replace, insert_update and * last_inserted_id which should be ch...
Fix a bug that might cause duplicate output rows when an IN operator is used in the WHERE clause. Ticket 61fe9745. Hashes: SQLITE_SOURCE_ID: "2017-06-17 09:59:36 036ebf729e4b21035d7f4f8e35a6f705e6bf99887889e2dc14ebf2242e7930dd" SHA3-256 for sqlite3.c: b0bd014f2776b9f...