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Category: Root
Jan 30
Dynamic SQL
“Dynamic SQL is the SQL statement that is constructed and executed at runtime based on input parameters passed” Example: ChatGPT DECLARE @sql AS NVARCHAR(MAX) SET @sql = ‘SELECT * FROM Employees WHERE Department = ”’ + @department + ”” EXEC sp_executesql @sql Another Example: Oracle table_name := ‘HR.Employees’; dyn_sql := ‘Select * from ‘ || …
Jan 29
What is a Dynamic Cursor in Oracle PL/SQL
Dynamic/Ref Cursor CREATE OR REPLACE PROCEDURE query_invoice( month VARCHAR2, year VARCHAR2) IS TYPE cur_typ IS REF CURSOR; c cur_typ; query_str VARCHAR2(200); inv_num NUMBER; inv_cust VARCHAR2(20); inv_amt NUMBER;BEGIN query_str := ‘SELECT num, cust, amt FROM inv_’ || month ||’_’|| year || ‘ WHERE invnum = :id’; OPEN c FOR query_str USING inv_num; LOOP FETCH c INTO …
Jan 19
Case Statement in Oracle PL/SQL
Write a SQL block that will categorize Employee Salaries. If the Salary is higher than average, it will show ‘Above Average’ to the output. If the Salary is lower than the average it will show ‘Below average’ to the output. Use HR.Employees Table. Also, utilize CASE statement.
Jan 15
Variable Declaration Conventions in Oracle PL/SQL
Ref: https://trivadis.github.io/plsql-and-sql-coding-guidelines/v4.1/2-naming-conventions/naming-conventions/
Jan 12
3D Scatter Plot in Python
Visualizing 3-D numeric data with Scatter Plots length, breadth and depth Ref: https://towardsdatascience.com/the-art-of-effective-visualization-of-multi-dimensional-data-6c7202990c57 import pandas as pdimport matplotlib.pyplot as pltfrom mpl_toolkits.mplot3d import Axes3Dimport matplotlib as mplimport numpy as npimport seaborn as sns%matplotlib inline fig = plt.figure(figsize=(8, 6))ax = fig.add_subplot(111, projection=’3d’) xs = wines[‘residual sugar’]ys = wines[‘fixed acidity’]zs = wines[‘alcohol’]ax.scatter(xs, ys, zs, s=50, alpha=0.6, edgecolors=’w’) ax.set_xlabel(‘Residual …
Jan 12
How to Disable SELinux
Ref: https://www.ibm.com/docs/en/tnpm/1.4.5?topic=tasks-disable-selinux-linux-only Sample File:
Jan 12
selinux: getsebool -a sample output
getsebool -a | head abrt_anon_write –> offabrt_handle_event –> offabrt_upload_watch_anon_write –> onantivirus_can_scan_system –> offantivirus_use_jit –> offauditadm_exec_content –> onauthlogin_nsswitch_use_ldap –> offauthlogin_radius –> offauthlogin_yubikey –> offawstats_purge_apache_log_files –> off
Jan 08
VPN (Business VPN) to connect to Corporate Network
Options: Cisco Any Connect Cisco Mobility Connect You will be able to download from: https://software.cisco.com/download/home Versions available for Windows, Mac, and Linux. Other Options: OpenConnect Global Protect NordLayer Using Anyconnect VPN on Linux: https://www.cisco.com/c/en/us/support/docs/smb/routers/cisco-rv-series-small-business-routers/kmgmt-2597-Installing-AnyConnect-Linux-Ubuntu-desktop-User-Interface.html Open Connect: https://www.infradead.org/openconnect/download.html NordLayer Business VPN: https://nordlayer.com/business-vpn “A VPN is a security solution that provides a tunnel between your organization’s resources …
Jan 05
Fix the WordPress Issue: Could not reach wordpress.org Curl Error 7
How to fix mail command does not work? yum install mailx or apt get install mailx
