LIKE 謂詞
說明
LIKE 謂詞用於搜尋特定模式。此謂詞也支援多個模式，包括量詞 ANY、SOME 和 ALL。
語法
[ NOT ] { LIKE search_pattern [ ESCAPE esc_char ] | [ RLIKE | REGEXP ] regex_pattern }
[ NOT ] { LIKE quantifiers ( search_pattern [ , ... ]) }
參數
-
search_pattern
指定
LIKE子句要搜尋的字串模式。它可以包含特殊模式比對字元%比對零個或多個字元。_比對剛好一個字元。
-
esc_char
指定跳脫字元。預設跳脫字元為
\。 -
regex_pattern
指定
RLIKE或REGEXP子句要搜尋的正規表示法搜尋模式。 -
quantifiers
指定謂詞量詞，包括
ANY、SOME和ALL。ANY或SOME表示如果輸入比對其中一個模式，則傳回 true；ALL表示如果輸入比對所有模式，則傳回 true。
範例
CREATE TABLE person (id INT, name STRING, age INT);
INSERT INTO person VALUES
(100, 'John', 30),
(200, 'Mary', NULL),
(300, 'Mike', 80),
(400, 'Dan', 50),
(500, 'Evan_w', 16);
SELECT * FROM person WHERE name LIKE 'M%';
+---+----+----+
| id|name| age|
+---+----+----+
|300|Mike| 80|
|200|Mary|null|
+---+----+----+
SELECT * FROM person WHERE name LIKE 'M_ry';
+---+----+----+
| id|name| age|
+---+----+----+
|200|Mary|null|
+---+----+----+
SELECT * FROM person WHERE name NOT LIKE 'M_ry';
+---+------+---+
| id| name|age|
+---+------+---+
|500|Evan_W| 16|
|300| Mike| 80|
|100| John| 30|
|400| Dan| 50|
+---+------+---+
SELECT * FROM person WHERE name RLIKE 'M+';
+---+----+----+
| id|name| age|
+---+----+----+
|300|Mike| 80|
|200|Mary|null|
+---+----+----+
SELECT * FROM person WHERE name REGEXP 'M+';
+---+----+----+
| id|name| age|
+---+----+----+
|300|Mike| 80|
|200|Mary|null|
+---+----+----+
SELECT * FROM person WHERE name LIKE '%\_%';
+---+------+---+
| id| name|age|
+---+------+---+
|500|Evan_W| 16|
+---+------+---+
SELECT * FROM person WHERE name LIKE '%$_%' ESCAPE '$';
+---+------+---+
| id| name|age|
+---+------+---+
|500|Evan_W| 16|
+---+------+---+
SELECT * FROM person WHERE name LIKE ALL ('%an%', '%an');
+---+----+----+
| id|name| age|
+---+----+----+
|400| Dan| 50|
+---+----+----+
SELECT * FROM person WHERE name LIKE ANY ('%an%', '%an');
+---+------+---+
| id| name|age|
+---+------+---+
|400| Dan| 50|
|500|Evan_W| 16|
+---+------+---+
SELECT * FROM person WHERE name LIKE SOME ('%an%', '%an');
+---+------+---+
| id| name|age|
+---+------+---+
|400| Dan| 50|
|500|Evan_W| 16|
+---+------+---+
SELECT * FROM person WHERE name NOT LIKE ALL ('%an%', '%an');
+---+----+----+
| id|name| age|
+---+----+----+
|100|John| 30|
|200|Mary|null|
|300|Mike| 80|
+---+----+----+
SELECT * FROM person WHERE name NOT LIKE ANY ('%an%', '%an');
+---+------+----+
| id| name| age|
+---+------+----+
|100| John| 30|
|200| Mary|null|
|300| Mike| 80|
|500|Evan_W| 16|
+---+------+----+
SELECT * FROM person WHERE name NOT LIKE SOME ('%an%', '%an');
+---+------+----+
| id| name| age|
+---+------+----+
|100| John| 30|
|200| Mary|null|
|300| Mike| 80|
|500|Evan_W| 16|
+---+------+----+