c oracle 入库

今天我们来谈论一下 C 语言与 Oracle 数据库入库的问题。对于开发者来说，数据的入库是一项非常重要的工作。在日常开发中，我们经常使用 Oracle 数据库来存取数据。而 C 语言则是一门常用的编程语言。那么，如何将数据存储到 Oracle 数据库中呢？下面就来详细介绍一下。

在 C 语言中，我们可以通过 Oracle OCI（Oracle Call Interface）来操作数据库。OCI 是 Oracle 提供的 C 语言 API，它可以让我们直接连接 Oracle 数据库，并对其进行操作。下面是一个简单的例子，展示了如何使用 OCI 将数据存储到 Oracle 数据库中。

#include #include int main(void) { int rc; OCIDefine *defhp = (OCIDefine *)0; OCIEnv *envhp = (OCIEnv *)0; OCIError *errhp = (OCIError *)0; OCIServer *srvhp = (OCIServer *)0; OCISvcCtx *svchp = (OCISvcCtx *)0; OCIStmt *stmthp = (OCIStmt *)0; OCIBind *bindhp = (OCIBind *)0; OCISession *authp = (OCISession *)0; rc = OCIInitialize((ub4) OCI_DEFAULT, (dvoid *)0, (dvoid * (*)(dvoid *, size_t)) 0, (dvoid * (*)(dvoid *, dvoid *, size_t))0, (void (*)(dvoid *, dvoid *)) 0 ); /* 创建环境句柄 */ rc = OCIEnvCreate((OCIEnv **) &envhp, (ub4) OCI_THREADED|OCI_OBJECT, (dvoid *)0, (dvoid * (*)(dvoid *, size_t)) 0, (dvoid * (*)(dvoid *, dvoid *, size_t))0, (void (*)(dvoid *, dvoid *)) 0, (size_t) 0, (dvoid **)0 ); /* 创建错误句柄 */ rc = OCIHandleAlloc((dvoid *) envhp, (dvoid **) &errhp, (ub4) OCI_HTYPE_ERROR, (size_t) 0, (dvoid **)0); /* 创建服务器句柄 */ rc = OCIHandleAlloc((dvoid *) envhp, (dvoid **) &srvhp, (ub4) OCI_HTYPE_SERVER,(size_t) 0, (dvoid **)0); rc = OCIHandleAlloc((dvoid *) envhp, (dvoid **) &authp, (ub4) OCI_HTYPE_SESSION,(size_t) 0, (dvoid **)0); /* 创建服务上下文句柄 */ rc = OCIHandleAlloc((dvoid *) envhp, (dvoid **) &svchp, (ub4) OCI_HTYPE_SVCCTX, (size_t) 0, (dvoid **)0); /* 连接到数据库 */ rc = OCILogon(envhp, errhp, &svchp, "scott","tiger","orcl", strlen("orcl")); /* 创建语句句柄 */ rc = OCIHandleAlloc((dvoid *) envhp, (dvoid **) &stmthp, (ub4) OCI_HTYPE_STMT, (size_t) 0, (dvoid **)0); rc = OCIStmtPrepare(stmthp, errhp, (text *)"INSERT INTO example_table VALUES (:1, :2)", (ub4) strlen("INSERT INTO example_table VALUES (:1, :2)"), (ub4) OCI_NTV_SYNTAX, (ub4) OCI_DEFAULT); rc = OCIBindByPos(stmthp, &bindhp, errhp, (ub4)1, (dvoid *)&integer_var, (sb4)sizeof(integer_var), (ub2)SQLT_INT, (dvoid *)0, (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, (ub4)OCI_DEFAULT); rc = OCIBindByPos(stmthp, &bindhp, errhp, (ub4)2, (dvoid *)&string_var, (sb4) sizeof(string_var), (ub2)SQLT_STR, (dvoid *)0, (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, (ub4)OCI_DEFAULT); rc = OCIStmtExecute(svchp, stmthp, errhp, (ub4)1, (ub4)0, (CONST OCISnapshot *) NULL, (OCISnapshot *) NULL, (ub4)OCI_DEFAULT); /* 释放句柄和资源 */ OCIHandleFree((dvoid *) authp, (ub4) OCI_HTYPE_SESSION); OCIHandleFree((dvoid *) srvhp, (ub4) OCI_HTYPE_SERVER); OCIHandleFree((dvoid *) svchp, (ub4) OCI_HTYPE_SVCCTX); OCIHandleFree((dvoid *) stmthp, (ub4) OCI_HTYPE_STMT); OCIHandleFree((dvoid *) errhp, (ub4) OCI_HTYPE_ERROR); OCIHandleFree((dvoid *) envhp, (ub4) OCI_HTYPE_ENV); return 0; }