我正在尝试使用单词列表填充 SQL 表.表格本身非常简单:
I'm trying to populate a SQL table with a list of words. The table itself it pretty simple:
CREATE TABLE WORDS(
ID BIGINT AUTO_INCREMENT,
WORD VARCHAR(128) NOT NULL UNIQUE,
PRIMARY KEY(ID)
);
我遇到的问题是:当我执行以下背靠背插入时
The problem I'm running into is this: when I do the following inserts back to back
INSERT INTO WORDS(WORD) VALUES('Seth');
INSERT INTO WORDS(WORD) VALUES('seth');
第二次插入失败,违反约束(重复条目 'seth' 键'WORD'").
The second insert fails with a constraint violation ("Duplicate entry 'seth' for key 'WORD'").
如何使 WORD
上的 UNIQUE
约束区分大小写?
How can I get the UNIQUE
constraint on WORD
to be case sensitive?
看起来 mysql 是 默认不区分大小写:
Looks like mysql is case insensitive by default:
您可能需要使用区分大小写的排序规则(例如 utf8_bin)创建列:
You probably need to create the column with a case sensitive collation (e.g. utf8_bin):
CREATE TABLE WORDS (
ID BIGINT AUTO_INCREMENT,
WORD VARCHAR(128) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL UNIQUE,
PRIMARY KEY(ID)
);
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