Question

我有一名FIELD 医生的病人，附表中的撇号紧急

我试过了：

package other;

public abstract class BaseClass {
    protected Integer field1;

    BaseClass () {
    }

    public Integer getField1 () {
        return field1;
    }

    public void setField1 (Integer field1) {
        this.field1 = field1;
    }
}

package my;

import other.BaseClass;

public abstract class BaseClassBuilder<T extends BaseClass, BU extends BaseClassBuilder> {
    protected T obj;

    protected BaseClassBuilder (T obj) {
        this.obj = obj;
    }

    protected final BU getThis () {
        return (BU) this;
    }

    public BU withField1 (Integer field1) {
        obj.setField1(field1);
        return getThis();
    }

    public T build () {
        return this.obj;
    }
}

package other;

import java.util.UUID;

public class SubClass extends BaseClass {
    protected UUID field2 = null;

    public SubClass () {
    }

    public UUID getField2 () {
        return field2;
    }

    public void setField2 (UUID field2) {
        this.field2 = field2;
    }
}

package my;

import java.util.UUID;

import other.SubClass;

public class SubClassBuilder<T extends SubClass, BU extends SubClassBuilder> extends BaseClassBuilder<T, BU> {
    protected SubClassBuilder (T obj) {
        super(obj);
    }

    public BU withField2 (UUID field2) {
        obj.setField2(field2);
        return getThis();
    }

    public T build () {
        return this.obj;
    }

    public static SubClassBuilder neu () {
        return new SubClassBuilder<>(new SubClass());
    }
}

package other;

public class SubSubClass extends SubClass {
    protected String field3 = null;

    public SubSubClass () {
    }

    public String getField3 () {
        return field3;
    }

    public void setField3 (String field3) {
        this.field3 = field3;
    }
}

package my;

import other.SubSubClass;

public class SubSubClassBuilder<T extends SubSubClass, BU extends SubSubClassBuilder<T, BU>> extends SubClassBuilder<T, BU> {
    protected SubSubClassBuilder (T obj) {
        super(obj);
    }

    public BU withField3 (String field3) {
        obj.setField3(field3);
        return getThis();
    }

    public T build () {
        return this.obj;
    }

    public static SubSubClassBuilder neu () {
        return new SubSubClassBuilder<>(new SubSubClass());
    }
}

Answer 1

您可以尝试以下方式。

SELECT [doctor'spatient] FROM emergency

Answer 2

设计非常糟糕，但我已经看过它了。还看到它的名字中有空格。你有两个。如果使用SQL Server，就像@mahabub建议的那样，将名称括在[方括号]中，如：

select [doctor's patient] from [emergency]

话虽这么说，您也可以使用SET QUOTED IDENTIFIER命令允许您使用双引号来分隔名称，例如，

select "doctor's patient" from "emergency"

Answer 3

我很惊讶数据库让列名称过去了。名称中的特殊字符通常是禁忌。如果您不是DBA，我建议与他们交谈以重命名没有撇号的字段，并且没有空格。它会让生活更轻松。

在查询中，尝试以\'

中的方式转义撇号

SELECT * FROM emergency.'doctor\'s patient';或

SELECT * FROM emergency."doctor\'s patient";

选择带撇号SQL的字段

3 个答案: