Question

您好我已经尝试使用以下查询从表中获取数据，但它无法正常工作..

@interface Bean : NSObject
// Add your props
// ...
// .....
@end

@implementation Bean

- (instancetype)init {
    self = [super init];
    if (self) {
        [self setDefaultPropValues];
        // TODO: All other initializations
    }
    return self;
}

- (void)setDefaultPropValues {
    [self setDefaultPropValuesForClass:self.class];
}

- (void)setDefaultPropValuesForClass:(Class)refClass {
    if (![refClass isSubclassOfClass:[Bean class]]) {
        return;
    }
    // First set default property values in super classes
    Class baseClass = class_getSuperclass(refClass);
    [self setDefaultPropValuesForClass:baseClass];
    //
    unsigned int numberOfProperties = 0;
    objc_property_t *propertyArray = class_copyPropertyList(refClass, &numberOfProperties);
    for (NSUInteger i = 0; i < numberOfProperties; i++)
    {
        objc_property_t property = propertyArray[i];
        NSString *name = [NSString stringWithUTF8String:property_getName(property)];
        const char * propAttr = property_getAttributes(property);
        NSString *propString = [NSString stringWithUTF8String:propAttr];
        NSArray *allAttrs = [propString componentsSeparatedByString:@","];
        // Check if property is readonly
        if (NSNotFound == [allAttrs indexOfObject:@"R"]) {
            // Find Property type token
            NSArray * attrArray = [propString componentsSeparatedByString:@"\""];
            if (attrArray.count > 1) {
                Class propType = NSClassFromString([attrArray objectAtIndex:1]);
                if ([propType isSubclassOfClass:[NSString class]]) {
                    [self setValue:@"" forKey:name];
                }
            }
        }
    }
    free(propertyArray);
}

@end

显示表SELECT ProductMaster.ProductName + '(' + CONVERT(nvarchar(10), 0) + ')' AS orderedproducts, BranchName + '(' + CONVERT(nvarchar(10), SUM(StockInward.Qty)) + ')' AS currentstock, Setup.Id AS BranchId FROM ProductMaster INNER JOIN StockOutward ON ProductMaster.Productid = StockOutward.productid INNER JOIN stockinward ON ProductMaster.Productid = stockinward.productid AND stockinward.StockLocation <> StockOutward.Location INNER JOIN Setup ON stockinward.stocklocation = Setup.id WHERE StockOutward.ProductId = '7' GROUP BY ProductMaster.ProductName, StockOutward.Qty, BranchName, Setup.Id中的所有记录。

Answer 1

尝试在您的内部联接中移动您的＆lt;＆gt;在where子句中。在您的示例中，您是否尝试了更简单的查询（选择1个简单元素并逐个添加内部连接。

不等于在sql查询中不起作用

1 个答案: