Warning
SingleStore 9.0 gives you the opportunity to preview, evaluate, and provide feedback on new and upcoming features prior to their general availability. In the interim, SingleStore 8.9 is recommended for production workloads, which can later be upgraded to SingleStore 9.0.
LIKE, NOT LIKE
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The LIKE and NOT LIKE operators are useful for matching patterns containing simple wildcards.
The % character appearing in a pattern matches any string and the _ character matches a single character.
CREATE TABLE like_s (b int, t varchar(20));INSERT INTO like_s VALUES(0, 'red'), (1, 'blue');
SELECT * FROM like_s WHERE t LIKE 'r_d';
+------+------+
| b | t |
+------+------+
| 0 | red |
+------+------+SELECT * FROM like_s WHERE t NOT LIKE 'r%';
+------+------+
| b | t |
+------+------+
| 1 | blue |
+------+------+You can use the backslash character \ as an escape character with a LIKE operator so that SingleStore interprets the wildcard character as a literal character.
SELECT "foo_" LIKE "foo\_";
+---------------------+
| "foo_" LIKE "foo\_" |
+---------------------+
| 1 |
+---------------------+Caution
Implicit Collation
When character_ is set to utf8, string literals with characters using 4-byte encoding are implicitly assigned binary collation and processed as a sequence of bytes rather than characters.utf8mb4 character set.
For more information, refer to Implicit Collation in Special Cases.
Last modified: February 28, 2023