diff --git a/package.json b/package.json
index bcdceee..aeea625 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@yizhi/postgres",
-  "version": "1.0.1",
+  "version": "1.0.4",
   "main": "dist/index.js",
   "types": "typing/index.d.ts",
   "scripts": {},
@@ -19,4 +19,4 @@
     "@types/pinyin": "^2.10.2",
     "typescript": "^5.6.3"
   }
-}
+}
\ No newline at end of file
diff --git a/src/entity.ts b/src/entity.ts
index d94d884..dc778fe 100644
--- a/src/entity.ts
+++ b/src/entity.ts
@@ -11,6 +11,8 @@ export interface IEntityFieldConfig {
 	prop: string
 	/** 是否是主键 */
 	primary: boolean
+	/** 是否是虚拟字段 */
+	virtual: boolean
 	/** 编码方式(存入数据库时) */
 	encode: (data: any) => string
 	/** 解码方式(查询数据库时) */
@@ -134,11 +136,12 @@ export function Table(table: string): Decorators.ClassDecorator<BasicEntity> {
  * @param encode 字段编码凡是
  * @param decode 字段解码方式
  * @param primary 是否是主键
+ * @param virtual 是否是虚拟字段
  */
-export function Field(name: string | undefined, encode: IEntityFieldConfig["encode"], decode: IEntityFieldConfig["decode"], primary: boolean): Decorators.PropDecorator<BasicEntity> {
+export function Field(name: string | undefined, encode: IEntityFieldConfig["encode"], decode: IEntityFieldConfig["decode"], primary: boolean, virtual: boolean): Decorators.PropDecorator<BasicEntity> {
 	return function (target, propertyKey) {
 		const conf = entityConfigOf(target.constructor)
-		conf.fields.push({ name: name ?? propertyKey, prop: propertyKey, encode, decode, primary });
+		conf.fields.push({ name: name ?? propertyKey, prop: propertyKey, encode, decode, primary, virtual });
 	}
 }
 
@@ -148,22 +151,32 @@ export function Field(name: string | undefined, encode: IEntityFieldConfig["enco
  * @param name 字段名称
  * @param option 字段选项
  */
-export function IntColumn(name: string, option?: { primary: boolean }): Decorators.PropDecorator<BasicEntity>
-export function IntColumn(option?: { primary: boolean }): Decorators.PropDecorator<BasicEntity>
+export function IntColumn(name: string, option?: { primary: boolean, virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function IntColumn(option?: { primary: boolean, virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
 export function IntColumn(name?: any, option?: any) {
 	if (typeof name != "string") {
 		option = name;
 		name = undefined;
 	}
-	return Field(name, v => escapeValue(v), v => v, option?.primary ?? false);
+	return Field(name, v => escapeValue(v), v => v, option?.primary ?? false, option?.virtual ?? false);
 }
 
 
 /**
  * 定义浮点数(包括定点小数)
  * @param name 字段名称
+ * @param option 字段选项
  */
-export function FloatColumn(name?: string) { return Field(name, v => escapeValue(v), v => v, false); }
+export function FloatColumn(option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function FloatColumn(name: string, option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function FloatColumn(name?: any, option?: any) {
+	if (typeof name !== "string") {
+		option = name;
+		name = undefined;
+	}
+
+	return Field(name, v => escapeValue(v), v => v, false, option?.virtual ?? false);
+}
 
 
 /**
@@ -171,21 +184,29 @@ export function FloatColumn(name?: string) { return Field(name, v => escapeValue
  * @param name 字段名称
  * @param option 字段选项
  */
-export function StringColumn(name: string, option?: { primary?: boolean }): Decorators.PropDecorator<BasicEntity>
-export function StringColumn(option?: { primary?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function StringColumn(option?: { primary?: boolean, virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function StringColumn(name: string, option?: { primary?: boolean, virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
 export function StringColumn(name?: any, option?: any) {
 	if (typeof name != "string") {
 		option = name
 		name = undefined
 	}
-	return Field(name, v => escapeValue(v), v => v, option?.primary ?? false);
+	return Field(name, v => escapeValue(v), v => v, option?.primary ?? false, option?.virtual ?? false);
 }
 
 /**
  * 定义布尔字段
  * @param name 字段名称
+ * @param option 字段选项
  */
-export function BooleanColumn(name?: string) {
+export function BooleanColumn(option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function BooleanColumn(name: string, option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function BooleanColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name
+		name = undefined
+	}
+
 	const checker = (v: any) => {
 		if (typeof v == "boolean") return v;
 		if (typeof v != "string") return false;
@@ -193,14 +214,22 @@ export function BooleanColumn(name?: string) {
 		return ["true", "yes", "on"].includes(v)
 	}
 
-	return Field(name, (v) => escapeValue(checker(v)), checker, false);
+	return Field(name, (v) => escapeValue(checker(v)), checker, false, option?.virtual ?? false);
 }
 
 /**
  * 定义日期字段
  * @param name 字段名称
+ * @param option 字段选项
  */
-export function DateColumn(name?: string) {
+export function DateColumn(option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function DateColumn(name: string, option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function DateColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name
+		name = undefined
+	}
+
 	return Field(name, v => {
 		if (v instanceof DateColumn) v = moment(v);
 		if (typeof v == "string") v = moment(v);
@@ -209,14 +238,21 @@ export function DateColumn(name?: string) {
 	}, v => {
 		if (typeof v == "string" || (v instanceof global.Date)) return moment(v).format("YYYY-MM-DD");
 		return null;
-	}, false);
+	}, false, option?.virtual ?? false);
 }
 
 /**
  * 定义日期时间字段
  * @param name 字段名称
  */
-export function DateTimeColumn(name?: string) {
+export function DateTimeColumn(option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function DateTimeColumn(name: string, option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function DateTimeColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name
+		name = undefined
+	}
+
 	return Field(name, v => {
 		if (v instanceof DateColumn) v = moment(v);
 		if (typeof v == "string") v = moment(v);
@@ -225,12 +261,12 @@ export function DateTimeColumn(name?: string) {
 	}, v => {
 		if (typeof v == "string" || (v instanceof global.Date)) return moment(v).format("YYYY-MM-DD HH:mm:ss");
 		return null;
-	}, false);
+	}, false, option?.virtual ?? false);
 }
 
 
 //数组定义
-function _Array<T>(name: string | undefined, typeName: string, itemEncoder: (v: any) => (string | null), itemDecoder: ((v: any) => (T | null)) | undefined) {
+function _Array<T>(name: string | undefined, typeName: string, itemEncoder: (v: any) => (string | null), itemDecoder: ((v: any) => (T | null)) | undefined, virtual: boolean) {
 	return Field(name, v => {
 		if (!(v instanceof Array)) throw new DatabaseError("DB_ENTITY_FIELD_NOT_ARRAY", `字段${name}需要给定一个数组`);
 		return escapeValue(`{${v.map(item => itemEncoder(item)).join(",")}}`) + `::${typeName}`;
@@ -238,7 +274,7 @@ function _Array<T>(name: string | undefined, typeName: string, itemEncoder: (v:
 		if (!(v instanceof Array)) return null;
 		if (itemDecoder) return v.map(item => itemDecoder(item));
 		else return v;
-	}, false);
+	}, false, virtual);
 }
 
 /**
@@ -246,8 +282,8 @@ function _Array<T>(name: string | undefined, typeName: string, itemEncoder: (v:
  * @param name 字段名称
  * @param option 字段选项
  */
-export function IntArrayColumn(name: string, option?: { bytes?: 2 | 4 | 8 }): Decorators.PropDecorator<BasicEntity>
-export function IntArrayColumn(option?: { bytes?: 2 | 4 | 8 }): Decorators.PropDecorator<BasicEntity>
+export function IntArrayColumn(name: string, option?: { bytes?: 2 | 4 | 8, virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function IntArrayColumn(option?: { bytes?: 2 | 4 | 8, virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
 export function IntArrayColumn(name?: any, option?: any) {
 	if (name && typeof name !== "string") {
 		option = name
@@ -262,26 +298,41 @@ export function IntArrayColumn(name?: any, option?: any) {
 		item = parseInt(item);
 		if (isNaN(item) || !isFinite(item)) return null;
 		return item;
-	});
+	}, option?.virtual ?? false);
 }
 
 /**
  * 定义字符串数组
  * @param name 字段名称
+ * @param option 字段选项
  */
-export function StringArrayColumn(name?: string) {
+export function StringArrayColumn(option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function StringArrayColumn(name: string, option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function StringArrayColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name
+		name = undefined
+	}
+
 	return _Array(name, "varchar[]", item => {
 		if (typeof item == "string") return item;
 		else return null;
-	}, item => item);
+	}, item => item, option?.virtual ?? false);
 }
 
 /**
  * 定义jsonb字段
  * @param name 字段名称
  */
-export function JsonColumn(name?: string) {
-	return Field(name, v => escapeValue(JSON.stringify(v)) + "::jsonb", v => v, false);
+export function JsonColumn(option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function JsonColumn(name: string, option?: { virtual?: boolean }): Decorators.PropDecorator<BasicEntity>
+export function JsonColumn(name?: any, option?: any) {
+	if (typeof name != "string") {
+		option = name
+		name = undefined
+	}
+
+	return Field(name, v => escapeValue(JSON.stringify(v)) + "::jsonb", v => v, false, option?.virtual ?? false);
 }
 
 /**
@@ -292,7 +343,7 @@ export function TSVectorColumn(name?: string) {
 	return Field(name, v => {
 		if (!(v instanceof TSVector)) throw new DatabaseError("DB_ENTITY_FIELD_NOT_TSVECTOR", `字段${name}需要给定一个TSVector`)
 		return `E'${v.value}'::tsvector`;
-	}, v => TSVector.fromValue(v), false);
+	}, v => TSVector.fromValue(v), false, false);
 }
 
 //获取实体配置
diff --git a/src/index.ts b/src/index.ts
index 8783c28..5c51879 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,8 +5,16 @@ export {
 	TSVectorColumn,
 	JoinOne, JoinMany,
 	BasicEntity,
+	IEntityConfig,
 } from "./entity";
 
+export {
+	IInsertBuilder,
+	IUpdateBuilder,
+	IDeleteBuilder,
+	ISelectBuilder,
+} from "./query";
+
 export * from "./type";
 export * from "./database";
 export * from "./error";
diff --git a/src/query.ts b/src/query.ts
index 1648b23..12f9ee4 100644
--- a/src/query.ts
+++ b/src/query.ts
@@ -23,6 +23,7 @@ interface IQueryFunc<R extends QueryResultRow = any> {
 	(sql: string, args?: any[]): Promise<QueryResult<R>>
 }
 
+type DataOrCustom<T> = T | (() => string);
 
 type StringArgs<Str extends string, P extends string, S extends string> = Str extends `${string}${P}${infer R}${S}${infer T}` ? (R | StringArgs<T, P, S>) : never;
 
@@ -189,7 +190,7 @@ export interface IInsertBuilder<E extends BasicEntity> extends IReturningFn<E> {
 	 * 设置要插入的数据
 	 * @param data 要插入的数据
 	 */
-	data<Name extends BasicFieldName<E>>(data: Pick<E, Name> | Pick<E, Name>[]): this;
+	data<Name extends BasicFieldName<E>>(data: { [P in Name]: DataOrCustom<E[P]> } | Array<{ [P in Name]: DataOrCustom<E[P]> }>): this;
 
 	/** 执行插入 */
 	query(): Promise<E[]>
@@ -200,7 +201,7 @@ export interface IUpdateBuilder<E extends BasicEntity> extends IWhereFn<E>, IRet
 	 * 设置更新数据
 	 * @param data 要更新的数据
 	 */
-	set(data: Partial<Pick<E, BasicFieldName<E>>>): this
+	set(data: { [P in BasicFieldName<E>]?: DataOrCustom<E[P]> }): this
 
 	/** 执行更新 */
 	query(): Promise<E[]>
@@ -435,7 +436,7 @@ function buildCondition<E extends BasicEntity>(builder: SQLBuilder<E>, option: C
 							wheres.push(`${fieldName}<${field.encode(opv)}`);
 							break;
 						case "lte":
-							wheres.push(`${fieldName}<=${field.encode(topVal)}`);
+							wheres.push(`${fieldName}<=${field.encode(opv)}`);
 							break;
 						case "like":
 							wheres.push(`${fieldName} like ${escapeValue(opv)}`);
@@ -754,7 +755,7 @@ export class InsertBuilder<E extends BasicEntity> extends WithReturning(SQLBuild
 		this.#query = query;
 	}
 
-	public data<Name extends BasicFieldName<E>>(data: Pick<E, Name> | Pick<E, Name>[]) {
+	public data<Name extends BasicFieldName<E>>(data: { [P in Name]: DataOrCustom<E[P]> } | Array<{ [P in Name]: DataOrCustom<E[P]> }>) {
 		data = (data instanceof Array) ? data : [data];
 		this.#values = [];
 		this.#columns = [];
@@ -763,9 +764,11 @@ export class InsertBuilder<E extends BasicEntity> extends WithReturning(SQLBuild
 		for (const item of data) {
 			const buffer: (string | null)[] = [];
 			for (const col of this.config.fields) {
+				if (col.virtual) continue;
 				if (!(col.prop in item)) continue;
 				const val = item[col.prop as keyof typeof item];
 				if (val === null || val === undefined) buffer.push("null");
+				else if (typeof val === "function") buffer.push(val());
 				else buffer.push(col.encode(val));
 				if (!columnsSet) this.#columns.push(escapeID(col.name));
 			}
@@ -801,12 +804,14 @@ export class UpdateBuilder<E extends BasicEntity> extends WithReturning(WithWher
 		this.#query = query;
 	}
 
-	public set(data: Partial<Pick<E, BasicFieldName<E>>>) {
+	public set(data: { [P in BasicFieldName<E>]?: DataOrCustom<E[P]> }) {
 		this.#updates = []
 		for (const col of this.config.fields) {
+			if (col.virtual) continue;
 			const val = data[col.prop as keyof typeof data];
 			if (val === undefined) continue;
-			if (val === null) this.#updates.push(`${escapeID(col.name)}=null`);
+			else if (val === null) this.#updates.push(`${escapeID(col.name)}=null`);
+			else if (typeof val === "function") this.#updates.push(`${escapeID(col.name)}=${val()}`);
 			else this.#updates.push(`${escapeID(col.name)}=${col.encode(val)}`);
 		}
 		return this;