python 连接Oracle 数据库厚连接方式

下载对应系统版本的Oracle Instant Client：https://www.oracle.com/database/technologies/instant-client.html
连接代码
python 复制代码
import oracledb

def oracle_thick_mode_demo(QHSQL):
    try:
        # ==============================================
        # 1. 初始化Thick模式（必须先执行）
        # ==============================================
        # 方式A：指定Oracle Instant Client路径（推荐）
        oracledb.init_oracle_client(lib_dir=r"C:\ORACLELINK\instantclient_23_0")  # Windows示例
        # oracledb.init_oracle_client(lib_dir="/opt/oracle/instantclient_19_11")  # Linux示例
        
        # 方式B：如果已配置环境变量ORACLE_HOME，可省略lib_dir参数
        # oracledb.init_oracle_client()

        # ==============================================
        # 2. 建立数据库连接
        # ==============================================
        # 建立连接
        connection = oracledb.connect(
            user="your_username",
            password="your_password",
            dsn="localhost:1521/orclpdb1"
        )
        print("✅ 数据库连接成功！")

        # ==============================================
        # 3. 执行查询
        # ==============================================
        with connection.cursor() as cursor:
            # 示例1：查询当前用户和数据库版本
            cursor.execute("SELECT USER, BANNER FROM V$VERSION WHERE ROWNUM <= 1")
            row = cursor.fetchone()
            print(f"当前用户: {row[0]}")
            print(f"数据库版本: {row[1]}")

            # 示例2：查询表格数据（替换为你的表名）
            print("\n📋 表格数据：")
            cursor.execute(QHSQL)  # 限制返回5条数据

            # 获取字段名列表
            column_names = [desc[0] for desc in cursor.description]
            print(" | ".join(column_names))  # 打印字段名
            print("-" * (len(" | ".join(column_names))))  # 打印分隔线

            # 打印每行数据
            for row in cursor:
                # 将每行数据转换为字符串并格式化输出
                print(" | ".join(str(col) if col is not None else "NULL" for col in row))
            # for row in cursor:
            #     print(row)

    except oracledb.Error as e:
        print(f"❌ 操作失败: {e}")
    finally:
        # ==============================================
        # 4. 关闭资源
        # ==============================================
        if 'connection' in locals() and connection:
            connection.close()
            print("\n🔌 数据库连接已关闭")

if __name__ == "__main__":
    QHSQL = """
SELECT
	flv.meaning 状态,
	'''' || jh.period_name 期间,
	to_char(jh.default_effective_date, 'YYYY-MM-DD') 有效日期,
	cc.padded_concatenated_segments 帐户,
	apps.xla_oa_functions_pkg.get_ccid_description(cc.chart_of_accounts_id,
	jl.code_combination_id) 帐户说明,
	jh.currency_code 币种,
	jl.entered_dr 原币借方金额,
	jl.entered_cr 原币贷方金额,
	jl.accounted_dr 本币借方金额,
	jl.accounted_cr 本币贷方金额,
	jh.currency_conversion_rate 汇率,
	/*'' 汇率类型,
        '' 单位,
        '' 数量,*/
	jb.name 批名,
	jh.name 日记帐名称,
	'''' || jh.doc_sequence_value 单据编号,
	'' 会计科目排序编号,
	jh.description 头说明,
	js.user_je_source_name 来源,
	jc.user_je_category_name 类别,
	to_char(jl.creation_date, 'YYYY-MM-DD HH24:MI:SS') 创建时间,
	/*'' 用户名,*/
	fu.user_name
    || '_'
    || fu.description 创建人,
	jb.approval_status_code 审批状态,
	jb.approver_employee_id 审批人,
	jb.posted_by 过账人,
	jl.je_line_num 行号,
	jl.description 行摘要,
	jl.attribute6 中台结算凭证号,
	jb.status 状态,
	to_char(jb.posted_date, 'YYYY-MM-DD HH24:MI:SS') 过账时间,
	jh.je_header_id,
	jh.reversed_je_header_id,
	cc.segment1 公司段,
	cc.segment3 科目段,
	cc.segment8 往来段 /*,
        (nvl(jl.entered_dr, 0) - nvl(jl.entered_cr, 0)) 原币借方减贷方,
        (nvl(jl.accounted_dr, 0) - nvl(jl.accounted_cr, 0)) 本位币借方减贷方*/
FROM
	gl_je_headers jh
JOIN gl_je_lines jl ON
	jh.je_header_id = jl.je_header_id
JOIN gl_je_batches jb ON
	jb.je_batch_id = jh.je_batch_id
JOIN gl_code_combinations_kfv cc ON
	jl.code_combination_id = cc.code_combination_id
JOIN gl_ledgers ldg ON
	ldg.ledger_id = jh.ledger_id
	AND cc.chart_of_accounts_id = ldg.chart_of_accounts_id
	AND ldg.ledger_category_code = 'PRIMARY'
JOIN gl_je_sources js ON
	jh.je_source = js.je_source_name
JOIN gl_je_categories jc ON
	jh.je_category = jc.je_category_name
JOIN fnd_flex_values_vl fv ON
	fv.flex_value_set_id = 1017489
	AND fv.flex_value = cc.segment3
LEFT JOIN fnd_user fu ON
	jl.created_by = fu.user_id
JOIN fnd_lookup_values flv ON
	jb.status = flv.lookup_code
	AND flv.view_application_id = 101
	AND flv.language = 'ZHS'
	AND flv.lookup_type = 'BATCH_STATUS'
WHERE
	1 = 1
	AND jh.period_name = '2025-13'
    -- AND ROWNUM <= 200
    """
    oracle_thick_mode_demo(QHSQL)