.::: Compare date and time and if statement in MySQL MariaDB, SQL Server :::.

A. Date and Time
-- MariaDB MySQL
select curdate() as tanggalskrng;
SELECT DAYNAME(curdate()) as haritanggal;
select date(NOW()) - interval 1 day as onedayagotanggal;
SELECT DAYNAME(date(NOW()) - interval 1 day) as harionedayagotanggal;
select current_timestamp() as dateandtimelast;
select date(current_timestamp()) as onlydatetimelast;
select DAYNAME(current_timestamp()) as haridateandtimelast;
 

.::: Install MySQL Dashboard and Collector in Grafana :::.

 B. Install MySQL Dashboard and Collector in Grafana

1. visit to collect Dasboard template (2mysql-simple-dashboard_rev6.json)
https://grafana.com/grafana/dashboards/?dataSource=mysql

2. Downlaod script
Before installing the dashboard, we need to set up a collector on our MySQL server. The collector script is downloaded from https://github.com/meob/my2Collector

wget https://codeload.github.com/meob/my2Collector/zip/refs/heads/master

.::: install and configure Grafana on CentOS 7 :::.

A. Install Grafana
1. Disable SELinux

2. Installing Grafana via YUM Repository

[root@nmslinux ~]# cat  /etc/yum.repos.d/grafana.repo
[grafana]
name=grafana
baseurl=https://packages.grafana.com/oss/rpm
repo_gpgcheck=1
enabled=1
gpgcheck=1
gpgkey=https://packages.grafana.com/gpg.key
sslverify=1
sslcacert=/etc/pki/tls/certs/ca-bundle.crt
[root@nmslinux ~]#
 

.::: Install MySQL Router load balancer for Galera MariaDB MySQL :::.

1. Disable selinux & firewalld
[root@mysqlrouter data]# sestatus
SELinux status:                 disabled
[root@mysqlrouter data]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
[root@mysqlrouter data]#

 

.::: How to Install and Configure MaxScale for MariaDB :::.

1. Add into the MaxScale server MaxScale server the MariaDB repositories

[root@maxscale data]# curl -sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup | sudo bash
# [info] Checking for script prerequisites.
# [info] MariaDB Server version 10.8 is valid
# [info] Repository file successfully written to /etc/yum.repos.d/mariadb.repo
# [info] Adding trusted package signing keys...
/etc/pki/rpm-gpg /data
/data
# [info] Successfully added trusted package signing keys
# [info] Cleaning package cache...
Loaded plugins: fastestmirror
Cleaning repos: base extras mariadb-main mariadb-maxscale mariadb-tools updates
Cleaning up list of fastest mirrors
[root@maxscale data]#
 

.::: Install ProxySQL load balancer for Galera MariaDB MySQL :::.

 1. Disable selinux & firewalld
[root@proxysql ~]# sestatus
SELinux status:                 disabled
[root@proxysql ~]#
[root@proxysql ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
[root@proxysql ~]#

2. additional hosts
[root@proxysql ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
10.10.10.51 mariadb01
10.10.10.52 mariadb02
10.10.10.100 severnines
10.10.10.140 proxysql
[root@proxysql ~]#
 

.::: How to Enable Performance report performance-schema MySQL, MariaDB :::.

1. Open MySQL WorkBench Server -> Performance report
mysqld --verbose --help | grep performance-schema

2. enable performance_schema in /etc/my.cnf
[mysqld]
performance_schema
#performance_schema_events_waits_history_size=20
#performance_schema_events_waits_history_long_size=15000

.::: Install HAProxy Load Balancer to MariaDB MySQL :::.

 1. Preparation
https://teguhth.blogspot.com/2022/03/how-to-create-ha-high-availability.html
wsrep_cluster_name="cluster1" , 0.0.0.0:3306 -> detect ip loopback & statistic
mariadb01 mariadb02 haproxy
[root@mariadb01 ~]# cat /etc/my.cnf.d/server.cnf
#
......................
# * Galera-related settings
#
[galera]
wsrep_on=ON
wsrep_provider=/usr/lib64/galera/libgalera_smm.so
wsrep_cluster_address="gcomm://10.10.10.51,10.10.10.52"
binlog_format=row
default_storage_engine=InnoDB
innodb_autoinc_lock_mode=2
bind-address=0.0.0.0
wsrep_cluster_name="cluster1"
wsrep_sst_method=rsync
wsrep_node_address= "10.10.10.51"
wsrep_node_name="mariadb01"

#wsrep_sst_auth=teguh:triharto
 

.::: SQL Server OFFSET FETCH :::.

select * from pembelian order by KODE_PEMBELIAN; select * from pembelian order by KODE_PEMBELIAN offset 5 rows;
select * from pembelian order by KODE_PEMBELIAN offset 5 rows FETCH NEXT 2 ROWS ONLY; select * from pembelian order by KODE_PEMBELIAN offset 0 rows FETCH NEXT 2 ROWS ONLY;

 

 

https://www.sqlservertutorial.net/sql-server-basics/sql-server-offset-fetch/ 

.::: Simple Archive data table in SQL :::.

 1. Main table will be archive  
USE [teguhth]
GO
select @@servername as ServerName, db_name() as DBName,* from pembelian -- original data from table
select @@servername as ServerName, db_name() as DBName,* from pembelian where TANGGAL_PEMBELIAN < '2020-07-02 00:00:00' -- original data will archive from table
 

.::: Simulation Execution Plan SQl Server & how to read :::.

1. query 1
USE [teguhth]
GO

Create Procedure [dbo].[SpBarang_pasok]

as
begin

select @@SERVERNAME as ServerName,
       @@servicename as ServiceName,
       DB_NAME() AS DBName,
       p.TANGGAL_PASOK,p.JUMLAH_PASOK
from  barang b,suplier s,pasok p
where
      b.KODE_BARANG=p.KODE_BARANG and s.KODE_SUPLIER=p.KODE_SUPLIER
order by TANGGAL_PASOK

end
GO
 

.::: Object ID, ObJect Name, Physical Index, database size, index size, drive size in MSSQL SQL Server :::.

274100017 = Person
2101582525 = EmployeeDepartmentHistory

1. List Object ID, Object Name, Table Name
SELECT  @@servername as ServerName,
        db_name() as [DBName],
        name as TableName,
        object_id,
        OBJECT_ID(name) AS [OBJECT_ID(name)]
FROM sys.objects
-- where  name = 'barang' or name = 'customer' or name = 'suplier' or
-- name = 'pasok' or name = 'pembelian' or name = 'sysdiagrams'
where  name in ('barang','customer','suplier','pasok','pembelian','sysdiagrams')
order by object_id

.::: How to list all objects of a particular database in SQL Server (List Object Name, Object ID) :::.

   SELECT @@servername as ServerName,db_name() as DbName, o.type_desc AS Object_Type
       ,  s.name AS Schema_Name
       ,  o.name AS Object_Name,object_id
       ,  o.name AS ObjectName
    FROM  sys.objects o
    JOIN  sys.schemas s
      ON  s.schema_id = o.schema_id
   WHERE  o.type NOT IN ('S'  --SYSTEM_TABLE
                        ,'PK' --PRIMARY_KEY_CONSTRAINT
                        ,'D'  --DEFAULT_CONSTRAINT
                        ,'C'  --CHECK_CONSTRAINT
                        ,'F'  --FOREIGN_KEY_CONSTRAINT
                        ,'IT' --INTERNAL_TABLE
                        ,'SQ' --SERVICE_QUEUE
                        ,'TR' --SQL_TRIGGER
                        ,'UQ' --UNIQUE_CONSTRAINT
                        )
ORDER BY  Object_Type
       ,  SCHEMA_NAME
       ,  Object_Name