Question

这个SQL查询有什么问题。我在转换

附近遇到语法错误

"SELECT * FROM collections c where c.submittedBy='679' AND CONVERT(varchar, c.eventTime, 103) ='2017-06-21'";

eventTime是＆＃34; eventTime＆＃34;：＆＃34; 2017-06-21T12：20：03.9366135 + 05:30＆＃34;

错误是

{"Message: {\"errors\":[{\"severity\":\"Error\",\"location\":{\"start\":64,\"end\":71},\"code\":\"SC1001\",\"message\":\"Syntax error, incorrect syntax near 'CONVERT'.\"}]}\r\nActivityId: a0c51c53-fca0-4c81-8f10-65348749e3d2"}

Answer 1

编写此查询（跨数据库）的最佳方法是：

SELECT c.*
FROM collections c 
WHERE c.submittedBy='679' AND 
      c.eventTime >= '2017-06-21' AND
      c.eventTime < '2017-06-22';

这允许数据库使用适当的索引进行过滤。请注意，如果submittedBy是数字，则不要使用单引号。

Answer 2

转换为日期之前转换为varchar

SELECT * 
FROM collections c 
where c.submittedBy='679' 
AND CONVERT(varchar(10), CONVERT(date, c.eventTime, 103)) = '2017-06-21'

如果eventTime已经是datetime字段，那么也应该这样..

SELECT * 
FROM collections c 
where c.submittedBy='679' 
AND CONVERT(date, c.eventTime) = '2017-06-21'

sql查询有什么问题

2 个答案: