Stored procedure and data export automation - sql

Question

I've created a stored procedure in Oracle SQL Developer that includes a set of queries. Every query returns a table that contains a large amount of data (over 2 million rows per table => the manual export already causes problems due to the size of data).
I want to automate the stored procedure and the export of every result table to a separate Excel sheet in one batch.
Thank you

Answer 1

I created a powershell script that exports all the tables of the specified user into separate csv files.
You can specify the desired list of tables in the query.
select TNAME from tab where tabtype='TABLE' and tname not like 'BIN$%'
If the table has 0 rows, then the csv file is not created.
In the script, you can specify the date format and code page for the strings.
$NLS_NUMERIC_CHARACTERS=".,"
$NLS_DATE_FORMAT="DD.MM.YYYY HH24:MI:SS"
$NLS_LANG="AMERICAN_AMERICA.UTF8"
The script exports all user tables to separate CSV files.
.\run_export_all_tables.ps1 -username SCOTT -password tiger -connect_string ORCL -csv_dir_path C:\upwork\powershell_sqlplus_export_csv\csv\ -log_file log_file.log
<#
.SYNOPSIS
The script exports all user tables to separate CSV files.
Author: Dmitry Demin dmitrydemin1973#gmail.com
.DESCRIPTION
In the script, the format for displaying the date and decimal separator is configured.
.PARAMETER username
Specify the username for example SCOTT
.PARAMETER password
Specify the password for example TIGER
.PARAMETER connect_string
Specify the connect_string(TNS alias) for connect to database from $ORACLE_HOME/network/admin/tnsnames.ora.
.PARAMETER csv_dir_path
Specify the csv directory for csv files
.PARAMETER log_file
Specify the log file for this script.
.EXAMPLE
The script exports all user tables to separate CSV files.
.\run_export_all_tables.ps1 -username SCOTT -password tiger -connect_string ORCL -csv_dir_path C:\upwork\powershell_sqlplus_export_csv\csv\ -log_file log_file.log
#>
param(
[string]$username = "scott",
[string]$password = "tiger",
[string]$connect_string = "esmd",
[string]$csv_dir_path = "C:\upwork\powershell_sqlplus_export_csv\csv\",
[string]$log_file = "C:\upwork\powershell_sqlplus_export_csv\log_file.log"
)
# Column separator for csv file
$COLSEP=";"
# NLS_NUMERIC_CHARACTERS
$NLS_NUMERIC_CHARACTERS=".,"
$NLS_DATE_FORMAT="DD.MM.YYYY HH24:MI:SS"
# Log file
$full_log_path=$log_file
# CSV directory
$full_csv_path=$csv_dir_path
#csv file extension
$csv_ext=".csv"
#Set NLS_LANG for session sqlplus
#"RUSSIAN_CIS.UTF8"
#"RUSSIAN_CIS.CL8MSWIN1251"
#"AMERICAN_AMERICA.UTF8"
#$NLS_LANG="RUSSIAN_CIS.CL8MSWIN1251"
$NLS_LANG="AMERICAN_AMERICA.UTF8"
#Set NLS_LANG for session sqlplus
[Environment]::SetEnvironmentVariable("NLS_LANG",$NLS_LANG , [System.EnvironmentVariableTarget]::PROCESS)
$env_path_NLS=[Environment]::GetEnvironmentVariable("NLS_LANG", [EnvironmentVariableTarget]::PROCESS)
echo "SET session NLS_LANG: $env_path_NLS" | tee-object -Append -filepath $full_log_path
$sqlQuery_show_user_tables =
#"
set heading off
set termout OFF
SET FEEDBACK OFF
SET TAB OFF
set pause off
set verify off
SET UNDERLINE OFF
set trimspool on
set timing off
set echo off
set linesize 1000
set pagesize 100
select TNAME from tab where tabtype='TABLE' and tname not like 'BIN$%'
;
exit
"#
$SqlQueryExportTable1 =
#"
set heading off
set termout OFF
SET FEEDBACK OFF
SET TAB OFF
set pause off
set verify off
SET UNDERLINE OFF
set trimspool on
set timing off
set echo off
set linesize 10000
set pagesize 0
SET COLSEP '$COLSEP'
ALTER SESSION SET NLS_NUMERIC_CHARACTERS='$NLS_NUMERIC_CHARACTERS';
ALTER SESSION SET NLS_DATE_FORMAT='$NLS_DATE_FORMAT';
select * from
"#
$SqlQueryExportTable2 =
#"
exit
"#
function Check_File
{
param (
[string]$pathfile
)
try {
$A=Get-Content -Path $pathfile -ErrorAction Stop
}
catch [System.UnauthorizedAccessException]
{
#Write-Host "File $pathfile is not accessible."
echo "File $pathfile is not accessible." | tee-object -Append -filepath $full_log_path
exit
}
catch [System.Management.Automation.ItemNotFoundException]
{
#Write-Host "File $pathfile is not found."
echo "File $pathfile is not found." | tee-object -Append -filepath $full_log_path
exit
}
catch {
Write-Host "File $pathfile. Other type of error was found:"
#Write-Host "Exception type is $($_.Exception.GetType().Name)"
echo "Exception type is $($_.Exception.GetType().Name)" | tee-object -Append -filepath $full_log_path
exit
}
}
echo "===========================================================================================" | tee-object -Append -filepath $full_log_path
$date_time_start = Get-Date -Format "yyyy-MM-dd HH:mm:ss"
$date_time_log = Get-Date -Format "yyyyMMddHHmmss"
Write-host "Script start time : $date_time_start "
try
{
echo "Script start time : $date_time_start ">>$full_log_path
}
catch {
Write-Host "Log File $full_log_path. Other type of error was found:"
Write-Host "Exception type is $($_.Exception.GetType().Name)"
exit
}
chcp 1251
$sqlQuery = $sqlQuery_show_user_tables
$sqlOutput = $sqlQuery | sqlplus -s $username/$password#$connect_string
$UserList =$sqlOutput| where {$_-notlike "" }
$i=1
echo "Found tables for export : " | tee-object -Append -filepath $full_log_path
foreach ($user_tab in $UserList)
{
echo " $i $user_tab" | tee-object -Append -filepath $full_log_path
$i=$i+1
}
foreach ($user_tab in $UserList)
{
$sqlQuery_show_table_all=""
$sqlQuery_show_table_all=$SqlQueryExportTable1+ $user_tab+ $SqlQueryExportTable2
$full_csv_path_file=$full_csv_path + $user_tab + "_" + $date_time_log + $csv_ext
echo "-------------------------------------------------------------------------------------------" | tee-object -Append -filepath $full_log_path
echo "For table : $user_tab will be created new csv file: $full_csv_path_file" | tee-object -Append -filepath $full_log_path
echo "Script will run for table: $user_tab " | tee-object -Append -filepath $full_log_path
$sqlOutput_tab = $sqlQuery_show_table_all | sqlplus -s $username/$password#$connect_string
$sqlOutput_count = $sqlOutput_tab.count
if ($sqlOutput_tab.count -gt 0)
{
Out-File -filepath $full_csv_path_file -append -inputobject $sqlOutput_tab -encoding default
echo "Exported rows: $sqlOutput_count " | tee-object -Append -filepath $full_log_path
}
else
{
echo "No exported rows: 0 row" | tee-object -Append -filepath $full_log_path
echo "$full_csv_path_file file not created " | tee-object -Append -filepath $full_log_path
}
echo "-------------------------------------------------------------------------------------------" | tee-object -Append -filepath $full_log_path
}
For example output script
Script start time : 2020-01-16 14:25:28
Found tables for export :
1 TEST_TABLE5
2 TEST_TABLE4
3 TEST_TABLE3
4 TEST_TABLE2
5 TEST_TABLE1
6 TEST2
7 TEST1
8 SALGRADE
9 EMP
10 DEPT
11 CL_TAB1
12 BONUS
-------------------------------------------------------------------------------------------
For table : TEST_TABLE5 will be created new csv file: .\csv\TEST_TABLE5_20200116142528.csv
Script will run for table: TEST_TABLE5
No exported rows: 0 row
.\csv\TEST_TABLE5_20200116142528.csv file not created
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : TEST_TABLE4 will be created new csv file: .\csv\TEST_TABLE4_20200116142528.csv
Script will run for table: TEST_TABLE4
No exported rows: 0 row
.\csv\TEST_TABLE4_20200116142528.csv file not created
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : TEST_TABLE3 will be created new csv file: .\csv\TEST_TABLE3_20200116142528.csv
Script will run for table: TEST_TABLE3
No exported rows: 0 row
.\csv\TEST_TABLE3_20200116142528.csv file not created
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : TEST_TABLE2 will be created new csv file: .\csv\TEST_TABLE2_20200116142528.csv
Script will run for table: TEST_TABLE2
No exported rows: 0 row
.\csv\TEST_TABLE2_20200116142528.csv file not created
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : TEST_TABLE1 will be created new csv file: .\csv\TEST_TABLE1_20200116142528.csv
Script will run for table: TEST_TABLE1
No exported rows: 0 row
.\csv\TEST_TABLE1_20200116142528.csv file not created
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : TEST2 will be created new csv file: .\csv\TEST2_20200116142528.csv
Script will run for table: TEST2
Exported rows: 213
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : TEST1 will be created new csv file: .\csv\TEST1_20200116142528.csv
Script will run for table: TEST1
Exported rows: 2
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : SALGRADE will be created new csv file: .\csv\SALGRADE_20200116142528.csv
Script will run for table: SALGRADE
Exported rows: 5
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : EMP will be created new csv file: .\csv\EMP_20200116142528.csv
Script will run for table: EMP
Exported rows: 14
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : DEPT will be created new csv file: .\csv\DEPT_20200116142528.csv
Script will run for table: DEPT
Exported rows: 7
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : CL_TAB1 will be created new csv file: .\csv\CL_TAB1_20200116142528.csv
Script will run for table: CL_TAB1
Exported rows: 4
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
For table : BONUS will be created new csv file: .\csv\BONUS_20200116142528.csv
Script will run for table: BONUS
No exported rows: 0 row
.\csv\BONUS_20200116142528.csv file not created
-------------------------------------------------------------------------------------------

Answer 2

To export a huge amount of data to an XLS file you can use:
https://www.oracle.com/webfolder/community/oracle_database/3784064.html
Also explained in
Create an Excel File (.xlsx) using PL/SQL