MySQL 查詢如何從字串中搜索精確單詞?
若要從字串中搜索精確單詞,請使用以下語法 -
select *from yourTableName where yourColumnName regexp '(^|[[:space:]])yourWord([[:space:]]|$)';
讓我們先建立一個表 -
mysql> create table DemoTable ( Title text ); Query OK, 0 rows affected (0.23 sec)
使用插入命令向表中插入一些記錄 -
mysql> insert into DemoTable values('This is the Introduction to Java');
Query OK, 1 row affected (0.05 sec)
mysql> insert into DemoTable values('This is the Introduction to MongoDB');
Query OK, 1 row affected (0.07 sec)
mysql> insert into DemoTable values('This is the Introduction to MySQL');
Query OK, 1 row affected (0.06 sec)使用 select 語句顯示錶中的所有記錄 -
mysql> select *from DemoTable;
這將生成以下輸出 -
+-------------------------------------+ | Title | +-------------------------------------+ | This is the Introduction to Java | | This is the Introduction to MongoDB | | This is the Introduction to MySQL | +-------------------------------------+ 3 rows in set (0.00 sec)
以下是用於從字串中搜索精確單詞的查詢。
mysql> select *from DemoTable where Title regexp '(^|[[:space:]])MySQL([[:space:]]|$)';
這將生成以下輸出 -
+-----------------------------------+ | Title | +-----------------------------------+ | This is the Introduction to MySQL | +-----------------------------------+ 1 row in set (0.13 sec)
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