小编Laz*_*tIT的帖子

我有一个数据结构列表:

        public List<Personal> Personals()
        {
            return new List<Personal>
                {
                    new Personal
                        {
                            Id = 0,
                            Name = "Name 0"
                        },
                    new Personal
                        {
                            Id = 1,
                            Name = "Name 1",
                            ParentId = 0
                        },
                    new Personal
                        {
                            Id = 2,
                            Name = "Name 2",
                            ParentId = 0
                        },
                    new Personal
                        {
                            Id = 3,
                            Name = "Name 3",
                            ParentId = 0
                        },
                    new Personal
                        {
                            Id = 4,
                            Name = "Name 4",
                            ParentId = 1
                        },
                    new Personal
                        {
                            Id …

我有一个循环和一个变量v_rownum,我想为它设置值:

        FOR donvi_rows IN v_donvi
        LOOP
            DECLARE
               v_rownum number;
            SELECT r
            INTO v_rownum
            FROM
            (SELECT ROWNUM AS r, k.Id
            FROM don_vi k
            WHERE k.ParentId = 1 )
            WHERE Id = donvi_rows.Id;

        END LOOP;

但它抛出异常:

PLS-00103: Encountered the symbol "SELECT" when expecting one of the following:

   begin function pragma procedure subtype type <an identifier>
   <a double-quoted delimited-identifier> current cursor delete
   exists prior
The symbol "begin" was substituted for "SELECT" to continue.

我正在学习Oracle.我不太了解它.请帮我解决我的问题.

我有3个实体:Obj1,Obj2,Obj3

如何使用automapper将3实体映射到一个实体？

我想将数字类型转换为字符串格式为:

number -> string

    1      -> 001
    2      -> 002
    12     -> 012
    340    -> 340