Linux/Unix shell sql 之间传递变量

 灵活结合Linux/Unix Shell 与SQL 之间的变量传输，极大程度的提高了DBA的工作效率，本文针对Linux/Unix shell sql 之间传递变量给出几个简单的示例以供参考。

       Linux/Unix 下调用SQL,RAMN 请参考：Linux/Unix shell 脚本中调用SQL,RMAN脚本

一、示例

 1、shell变量接受sql返回值之方式一
 oracle@SZDB:~> more ./retval.sh
 #!/bin/bash
 RETVAL=`sqlplus -silent scott/tiger <
 SET PAGESIZE 0 FEEDBACK OFF VERIFY OFF HEADING OFF ECHO OFF
 SELECT * FROM emp WHERE ename='SCOTT';
 EXIT;
 EOF`
 if [ -z "$RETVAL" ]; then
   echo "No rows returned from database"
   exit 0
 else
   echo $RETVAL
 fi

 oracle@SZDB:~> chmod u+x retval.sh
 oracle@SZDB:~> ./retval.sh
 7788 SCOTT ANALYST 7566 19-APR-87 34171.88 20

 2、shell变量接受sql返回值之方式二
 oracle@SZDB:~> more ./retval_2.sh
 #!/bin/bash
 # Author : Robinson Cheng
 # Blog   : http://blog.csdn.net/robinson_0612
 sqlplus -S "scott/tiger" <
 SET PAGESIZE 0 FEEDBACK OFF VERIFY OFF HEADING OFF ECHO OFF
 col cnt new_value v_cnt
 SELECT count(*) cnt FROM emp WHERE deptno=10;
 exit v_cnt
 EOF
 VALUE="$?"
 echo "show rows for deptno 10:$VALUE"

 3、将shell变量作为参数传递给sql脚本
 oracle@SZDB:~> more ./retval_3.sh
 #!/bin/bash
 v_empno="$1"
 sqlplus -S "scott/tiger" <
 SET PAGESIZE 0 FEEDBACK OFF VERIFY OFF HEADING OFF ECHO OFF
 SELECT ename FROM emp WHERE empno=$v_empno;
 exit
 EOF
 exit

 oracle@SZDB:~> ./retval_3.sh 7788
 SCOTT