update tablename set source_name = "bj1062-北京市朝阳区常营北辰福第" where source_name = "-北京市朝阳区常营北辰福第"
update tbl_name set str_col="xxx" = "yyy"
update tbl_name set (str_col="xxx" )= "yyy"
update tbl_name set str_col=("xxx" = "yyy")select "xxx" = "yyy"
update tbl_name set str_col="xxx" = "yyy"
update tbl_name set str_col=0
= ;
+----+---------+
str_col
aaa
aaa
name where str_col="xxx" = "yyy"\G
id: 1
select_type: SIMPLE
table: tbl_name
type: index
possible_keys: NULL
key: idx_str
key_len: 33
ref: NULL
rows: 4
filtered: 100.00
Extra: Using where; Using index
1 row in set, 1 warning (0.00 sec)
Note (Code 1003): // select .. AS ,.. AS from . where ((.. = 'xxx') = 'yyy')
((`test`.`tbl_name`.`str_col` = 'xxx') = 'yyy')
+;
+
| + |
+
| |
+
row set, warning ( sec)
mysql [localhost] {msandbox} (test) > =;
+
| = |
+
| |
+
row set ( sec)
select id,str_col from tbl_name where 1=1;
