layout | title | displayTitle | license |
---|---|---|---|
global |
LIKE Predicate |
LIKE Predicate |
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
|
A LIKE predicate is used to search for a specific pattern.
[ NOT ] { LIKE search_pattern [ ESCAPE esc_char ] | [ RLIKE | REGEXP ] regex_pattern }
-
search_pattern
Specifies a string pattern to be searched by the
LIKE
clause. It can contain special pattern-matching characters:%
matches zero or more characters._
matches exactly one character.
-
esc_char
Specifies the escape character. The default escape character is
\
. -
regex_pattern
Specifies a regular expression search pattern to be searched by the
RLIKE
orREGEXP
clause.
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|
+---+------+---+