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Filter Records The WHERE clause is used to filter records. It is used to extract only those records that fulfill a specified condition. If we want to return only the records where city is London, we can specify that in the WHERE clause: Example Run Example » Text Fields vs. Numeric Fields PostgreSQL requires quotes around text values. However, numeric fields should…

Node.js provides the facility to get process information such as process id, architecture, platform, version, release, uptime, upu usage etc. It can also be used to kill process, set uid, set groups, unmask etc. The process is a global object, an instance of EventEmitter, can be accessed from anywhere. Node.js Process Properties A list of…

Understanding CSS Units The units in which length is measured can be either absolute such as pixels, points and so on, or relative such as percentages (%) and em units. Specifying CSS units is obligatory for non-zero values, because there is no default unit. Missing or ignoring a unit would be treated as an error. However, if…

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