group concat separator

Replace, concat, and cast character string functions in mysql need to export a personal information of job-seeking users. This information requires three-table joint query requirements: birthdate format: 1990.01.02 Database: Gender display: men and

Talking about the concat function in mysql, mysql adds a string before/after the field, and mysqlconcat How to Use the concat function in MySQL: CONCAT (str1, str2 ,...) Returns the string generated by the connection parameter. If any parameter is

Difference between concat and concat_ws () and group_concat (), repeat () string functions 1, concat () functions 1.1 The concat function of MySQL can connect one or more strings, such Mysql> select concat ('10 '); + -------------- + | Concat ('10')

Difference between concat and concat_ws () and several practical MySQL string functions bitsCN. com1 and concat () 1.1 The concat function of MySQL can connect one or more strings, such Mysql> select concat ('10 '); + -------------- + | Concat ('10')

1. concat () function1.1 The concat function of MySQL can connect one or more strings, suchMysql> select concat ('10 ');+ -------------- +| Concat ('10') |+ -------------- +| 10 |+ -------------- +1 row in set (0.00 sec) Mysql> select concat ('11', '

1. Concat () function1.1 The Concat function of MySQL can connect one or more strings, suchMysql> select Concat ('10 ');+ -------------- +| Concat ('10') |+ -------------- +| 10 |+ -------------- +1 row in SET (0.00 Sec) Mysql> select Concat ('11', '

MySQL SQL character join function 1, Concat () function     1.1 MySQL's Concat function can connect one or more strings, such as    & nbsp;    mysql> Select concat (' 10 ');         +--------------+         | Concat (' 10 ') |         +--------

concat function in MySQLHow to use:CONCAT (STR1,STR2,...)Returns the string that results from the connection parameter. If any one of the arguments is NULL, the return value is null.Attention:If all parameters are non-binary strings, the result is a

concat function in MySQLHow to use:CONCAT (STR1,STR2,...)Returns the string that results from the connection parameter. If any one of the arguments is NULL, the return value is null.Attention:If all parameters are non-binary strings, the result is a

How to use:CONCAT (STR1,STR2,...)Returns the string that results from the connection parameter. If any one of the arguments is NULL, the return value is null.Attention:If all parameters are non-binary strings, the result is a non-binary string.If