sql - how to connect to a oracle db in bash script?

Sql - how to connect to a oracle db in bash script?

You can connect to an Oracle database in a bash script using the sqlplus command-line tool, which is provided by Oracle for executing SQL commands and scripts. Here's how you can do it:

#!/bin/bash # Set Oracle environment variables export ORACLE_HOME=/path/to/oracle_home export PATH=$ORACLE_HOME/bin:$PATH # Define Oracle credentials and connection details username="your_username" password="your_password" hostname="your_hostname" port="your_port" service_name="your_service_name" # SQL script to execute sql_script="your_script.sql" # Connect to Oracle database using sqlplus sqlplus -S ${username}/${password}@${hostname}:${port}/${service_name} <<EOF @$sql_script EOF

In this script:

  • Set the ORACLE_HOME environment variable to the directory where Oracle client tools are installed.
  • Set the PATH environment variable to include the bin directory within ORACLE_HOME.
  • Define the Oracle database credentials (username, password), hostname, port, and service name.
  • Specify the SQL script you want to execute.
  • Use the sqlplus command with the -S option to suppress banners and headers.
  • Pass the username, password, hostname, port, and service name to sqlplus using the connection string ${username}/${password}@${hostname}:${port}/${service_name}.
  • Use a here-document (<<EOF ... EOF) to pass SQL commands from the script directly to sqlplus.

Make sure to replace placeholders (your_username, your_password, etc.) with your actual database connection details and SQL script.

Also, ensure that the Oracle client tools (including sqlplus) are installed and accessible on your system.

Examples

  1. How to connect to Oracle database using sqlplus in a bash script?

    • Description: This script connects to an Oracle database using sqlplus with provided username, password, and SQL query.
    • Code:
      #!/bin/bash username="your_username" password="your_password" database="your_database" sql_query="SELECT * FROM your_table;" sqlplus -s ${username}/${password}@${database} <<EOF ${sql_query} exit EOF

  2. How to connect to Oracle database using tnsnames.ora alias in a bash script?

    • Description: This script connects to an Oracle database using an alias defined in tnsnames.ora.
    • Code:
      #!/bin/bash tns_alias="your_tns_alias" username="your_username" password="your_password" sql_query="SELECT * FROM your_table;" sqlplus -s ${username}/${password}@${tns_alias} <<EOF ${sql_query} exit EOF

  3. How to connect to Oracle database securely with encrypted password in a bash script?

    • Description: This script connects to an Oracle database using a securely encrypted password file.
    • Code:
      #!/bin/bash username="your_username" encrypted_password="/path/to/encrypted_password_file" database="your_database" sql_query="SELECT * FROM your_table;" sqlplus -s ${username}@${database} @${encrypted_password} <<EOF ${sql_query} exit EOF

  4. How to connect to Oracle database using EZCONNECT syntax in a bash script?

    • Description: This script connects to an Oracle database using EZCONNECT syntax without needing a tnsnames.ora file.
    • Code:
      #!/bin/bash username="your_username" password="your_password" database="//hostname:port/service_name" sql_query="SELECT * FROM your_table;" sqlplus -s ${username}/${password}@${database} <<EOF ${sql_query} exit EOF

  5. How to connect to Oracle database and run SQL file in a bash script?

    • Description: This script connects to an Oracle database and executes SQL commands stored in a file.
    • Code:
      #!/bin/bash username="your_username" password="your_password" database="your_database" sql_file="/path/to/your_script.sql" sqlplus -s ${username}/${password}@${database} @${sql_file}

  6. How to connect to Oracle database using oci driver in a bash script?

    • Description: This script connects to an Oracle database using the oci driver for more advanced connection options.
    • Code:
      #!/bin/bash username="your_username" password="your_password" database="your_database" sql_query="SELECT * FROM your_table;" echo ${sql_query} | sqlplus -S ${username}/${password}@${database}

  7. How to connect to Oracle database and retrieve result in CSV format in a bash script?

    • Description: This script connects to an Oracle database and retrieves query results in CSV format.
    • Code:
      #!/bin/bash username="your_username" password="your_password" database="your_database" sql_query="SELECT * FROM your_table;" sqlplus -s ${username}/${password}@${database} <<EOF SET PAGESIZE 0 SET COLSEP ',' SET FEEDBACK OFF SET HEADING OFF ${sql_query} exit EOF

  8. How to connect to Oracle database using jdbc driver in a bash script?

    • Description: This script connects to an Oracle database using the jdbc driver for Java-based connections.
    • Code:
      #!/bin/bash jdbc_url="jdbc:oracle:thin:@hostname:port:service_name" username="your_username" password="your_password" sql_query="SELECT * FROM your_table;" java -cp /path/to/ojdbc.jar oracle.jdbc.OracleDriver "${jdbc_url}" "${username}" "${password}" "${sql_query}"

  9. How to connect to Oracle database using odbc driver in a bash script?

    • Description: This script connects to an Oracle database using the odbc driver for ODBC-based connections.
    • Code:
      #!/bin/bash dsn="your_odbc_dsn" username="your_username" password="your_password" sql_query="SELECT * FROM your_table;" isql -v ${dsn} ${username} ${password} <<EOF ${sql_query} exit EOF

  10. How to connect to Oracle database using sqlcl (SQL Command Line) in a bash script?

    • Description: This script connects to an Oracle database using sqlcl, Oracle's enhanced command-line tool.
    • Code:
      #!/bin/bash username="your_username" password="your_password" database="your_database" sql_query="SELECT * FROM your_table;" sqlcl -S ${username}/${password}@${database} <<EOF ${sql_query} exit EOF

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