利用SQL查询插入数据
如何将sql查询结果（不止一项）插入到一张表中，我们一般可以用如下形式的sql
insert into table1
select field1,field2,... from table2
where ...
它要求对应的插入项类型必须一致。
另外，当select的查询结果是table1的所有字段的时候，可以省略table1的列字段，写成如下形式：
insert into table1(field1,field2,...)
select field1,field2,... from table2
where ...
在实际当中我们可能遇到 进行表单填报数据时,这时表单里面的值是变量
strSql.Append("insert into tny_surveyArea(");
strSql.Append("surveyAreaId,TaskID,biologyId,biologyType,generationId,wormAgeId,statusId,damageCodeId,occurArea,deadTreeCount,Remark,SurveyTypeId,SurveyDate,surveyUserID,inputUserId,CheckStatus,GPSCoor,IsCheckData,SmallFieldID,Geometry, Geometry_XLO, Geometry_YLO, Geometry_XHI, Geometry_YHI");
strSql.Append(")");
strSql.Append(" select ");
strSql.Append("'" + model.surveyAreaId + "',");
strSql.Append("" + model.TaskID + ",");
strSql.Append("'" + model.biologyId + "',");
strSql.Append("'" + model.biologyType + "',");
strSql.Append("'" + model.generationId + "',");
strSql.Append("'" + model.wormAgeId + "',");
strSql.Append("'" + model.statusId + "',");
strSql.Append("" + model.damageCodeId + ",");
strSql.Append("" + model.occurArea + ",");
strSql.Append("" + model.deadTreeCount + ",");
strSql.Append("'" + model.Remark + "',");
strSql.Append("" + model.SurveyTypeId + ",");
strSql.Append("'" + model.SurveyDate + "',");
strSql.Append("'" + model.surveyUserID + "',");
strSql.Append("'" + model.inputUserId + "',");
strSql.Append("" + model.CheckStatus + ",");
strSql.Append("'" + model.GPSCoor + "',");
strSql.Append("" + model.IsCheckData + ",");
strSql.Append("'" + model.SmallFieldID + "',");
string temp = " Geometry,Geometry_XLO, Geometry_YLO, Geometry_XHI, Geometry_YHI from tr_SmallField WHERE smallFieldId = '{0}' ";
temp = string.Format(temp, model.SmallFieldID);
strSql.Append(temp);
strSql.Append(";");
当执行到这里时,
然后就变成了 这里面 model数值 就成了 常量;
insert into tny_surveyArea
(surveyAreaId,
TaskID,
biologyId,
biologyType,
generationId,
wormAgeId,
statusId,
damageCodeId,
occurArea,
deadTreeCount,
Remark,
SurveyTypeId,
SurveyDate,
surveyUserID,
inputUserId,
CheckStatus,
GPSCoor,
IsCheckData,
SmallFieldID,
Geometry,
Geometry_XLO,
Geometry_YLO,
Geometry_XHI,
Geometry_YHI)
select 'ebd83ca8a3564823a8d5d0effedaf30f',
1,
'402001',
'虫',
'3fbecf367f8e4b3c864cebd9c9d3fbce',
'd7f9779d711f460c88d0c3b17d0218d7',
'9f649e78d499469bbc8ccc45972a50c2',
3,
231,
0,
'213',
7,
'2009-10-15 16:26:07',
'7075DC89F0T2D886E040A8C065A71E70',
'7075DC89F0T2D886E040A8C065A71E70',
0,
'',
0,
'3070',
Geometry,
Geometry_XLO,
Geometry_YLO,
Geometry_XHI,
Geometry_YHI
from tr_SmallField
WHERE smallFieldId = '3070';
这样利用了 把 tr_SmallField 里面的 Geometry, Geometry_XLO, Geometry_YLO, Geometry_XHI,
Geometry_YHI
5个字段插入到 tny_surveyArea 里面了