mysql和postgresql转义字符探究

mysql> create table usr (name varchar(5), age integer);
Query OK, 0 rows affected (0.05 sec)

mysql> insert into usr values (‘kate‘, 28);
Query OK, 1 row affected (0.01 sec)

mysql> insert into usr values (‘kate\‘‘, 28);
Query OK, 1 row affected (0.01 sec)

mysql> select * from usr;
+-------+------+
| name  | age  |
+-------+------+
| kate  |   28 |
| kate‘ |   28 |
+-------+------+
2 rows in set (0.00 sec)

mysql> insert into usr values (‘kate\\‘, 28);
Query OK, 1 row affected (0.01 sec)

mysql> select * from usr;
+-------+------+
| name  | age  |
+-------+------+
| kate  |   28 |
| kate‘ |   28 |
| kate\ |   28 |
+-------+------+
3 rows in set (0.00 sec)

mysql> insert into usr values (‘kate"‘, 28);
Query OK, 1 row affected (0.01 sec)

mysql> select * from usr;
+-------+------+
| name  | age  |
+-------+------+
| kate  |   28 |
| kate‘ |   28 |
| kate\ |   28 |
| kate" |   28 |
+-------+------+
4 rows in set (0.00 sec)

test=# create table usr (name varchar(5), age integer);
CREATE TABLE
test=# insert into usr values (‘kate‘, 28);
INSERT 0 1
test=# insert into usr values (‘kate‘‘‘, 28), (‘kate\‘, 28), (‘kate"‘, 28);
INSERT 0 3
test=# select * from usr;
 name  | age
-------+-----
 kate  |  28
 kate‘ |  28
 kate\ |  28
 kate" |  28