wheres.Add(new EqualsCondition() { FieldName = "IsUpload", Value = false})还要让value=null
时间: 2024-03-06 11:50:38 浏览: 11
根您的描述,这是一段 C# 代码,wheres 是一个条件列表,其中包含一个 EqualsCondition 对象,该对象的 FieldName 属性值为 "IsUpload",Value 属性值为 false。您想要将 Value 属性值设置为 null,以便在查询中使用此条件时,不考虑 Value 属性的值。
如果您想要将 Value 属性值设置为 null,您可以尝试以下代码:
```
wheres.Add(new EqualsCondition() { FieldName = "IsUpload", Value = null });
```
这样,当您在查询中使用此条件时,将不考虑 Value 属性的值。
相关问题
wheres.Add(new EqualsCondition() { FieldName = "IsUpload", Value = null });需要value=null 或者 value=false
如果您想要查询 IsUpload 字段为 null 或者 false 的记录,您可以使用以下代码:
```
wheres.Add(new OrCondition(
new EqualsCondition() { FieldName = "IsUpload", Value = null },
new EqualsCondition() { FieldName = "IsUpload", Value = false }
));
```
这样,当您在查询中使用此条件时,将会查询出 IsUpload 字段为 null 或者 false 的记录。
SELECT g.G6_DETECTION_ID G6_DETECTION_ID, t.veh_clzzqymc sccmc, t.veh_clxh vehicle_model, g.VIN VIN, t.VIN TVIN, tt.VIN TTVIN, tt.CAR_TYPE CARTYPE, tt.XXGKBH XXGKBH, t.VEH_CLPP SB, t.VEH_CPSCDZ SCCDZ, to_char( t.VEH_CLSCRQ, 'yyyy"年"mm"月"dd"日"' ) SCDATE, t.VEH_FDJH FDJH, g.FDJSB FDJSB, g.FDJSCCDZ FDJSCCDZ, g.RH RH, g.ET ET, g.AP AP, g.TESTTYPE TEST_TYPE, g.TESTNO TESTNO, g.TESTDATE TEST_DATE, g.APASS APASS, g.OPASS OPASS, g.OTESTDATE OTESTDATE, g.EPASS EPASS, g.RESULT RESULT, g.YR YR, g.ANALYMANUF ANALYMANUF, g.ANALYNAME ANALYNAME, g.ANALYMODEL ANALYMODEL, g.ANALYDATE ANALYDATE, g.DYNOMODEL DYNOMODEL, g.DYNOMANUF DYNOMANUF, g.ISUPLOAD ISUPLOAD, g.UPLOADDATE UPLOADDATE, g.ISUPLOADSECCESS ISUPLOADSECCESS, g.UPLOADUSER UPLOADUSER, g.UPLOADPERSON UPLOADPERSON, g.UPLOADMES UPLOADMES, g.ISAUTOUPLOAD, t.is_sample ISSAMPLE, t.FRIST_PRINT_DATE BANCI, g.OBDINSPECTOR, SUBSTR( g.VIN, 8, 1 ) AS DLLX, T_DLLX.NAME AS DLLXNAME FROM G6_DETECTION_RESULT g LEFT JOIN T_VEHCERT_PRINT t ON g.VIN = t.VIN LEFT JOIN T_HBBQ_PRINT tt ON g.VIN = tt.VIN LEFT JOIN T_DLLX ON SUBSTR( g.VIN, 8, 1 ) = T_DLLX.CODE WHERE tt.car_type!='E' 通过car_type查询出来的数据应该有五条,但是自动去除car_type为空的四条数据,怎么做可以不去掉这四条数据
你可以使用以下 SQL 语句来查询出所有的数据,包括 car_type 为空的数据:
```
SELECT
g.G6_DETECTION_ID G6_DETECTION_ID,
t.veh_clzzqymc sccmc,
t.veh_clxh vehicle_model,
g.VIN VIN,
t.VIN TVIN,
tt.VIN TTVIN,
tt.CAR_TYPE CARTYPE,
tt.XXGKBH XXGKBH,
t.VEH_CLPP SB,
t.VEH_CPSCDZ SCCDZ,
to_char(t.VEH_CLSCRQ, 'yyyy"年"mm"月"dd"日"') SCDATE,
t.VEH_FDJH FDJH,
g.FDJSB FDJSB,
g.FDJSCCDZ FDJSCCDZ,
g.RH RH,
g.ET ET,
g.AP AP,
g.TESTTYPE TEST_TYPE,
g.TESTNO TESTNO,
g.TESTDATE TEST_DATE,
g.APASS APASS,
g.OPASS OPASS,
g.OTESTDATE OTESTDATE,
g.EPASS EPASS,
g.RESULT RESULT,
g.YR YR,
g.ANALYMANUF ANALYMANUF,
g.ANALYNAME ANALYNAME,
g.ANALYMODEL ANALYMODEL,
g.ANALYDATE ANALYDATE,
g.DYNOMODEL DYNOMODEL,
g.DYNOMANUF DYNOMANUF,
g.ISUPLOAD ISUPLOAD,
g.UPLOADDATE UPLOADDATE,
g.ISUPLOADSECCESS ISUPLOADSECCESS,
g.UPLOADUSER UPLOADUSER,
g.UPLOADPERSON UPLOADPERSON,
g.UPLOADMES UPLOADMES,
g.ISAUTOUPLOAD,
t.is_sample ISSAMPLE,
t.FRIST_PRINT_DATE BANCI,
g.OBDINSPECTOR,
SUBSTR(g.VIN, 8, 1) AS DLLX,
T_DLLX.NAME AS DLLXNAME
FROM
G6_DETECTION_RESULT g
LEFT JOIN T_VEHCERT_PRINT t ON g.VIN = t.VIN
LEFT JOIN T_HBBQ_PRINT tt ON g.VIN = tt.VIN
LEFT JOIN T_DLLX ON SUBSTR(g.VIN, 8, 1) = T_DLLX.CODE
WHERE
tt.car_type != 'E' OR tt.car_type IS NULL
```
这样就可以保留 car_type 为空的数据了。