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Add a comment. 1. In pgAdmin 4, just find the table in the tree on the left, e.g.: Servers + PostgreSQL 11 + Databases + MYDATABASENAME + Schemas + public + Tables + MYTABLENAME <-- click this tree element. When the table is selected, open the SQL tab on the right. It displays the CREATE TABLE for the selected table. An example of WHERE clause in PostgreSQL paired with NOT EQUAL comparison operator You can use more than one comparison operator with the clause WHERE. Let's try it with AND and the < NOT EQUAL comparison operators. 1 SELECT * FROM customer_info WHERE lastname < 'Elizario' AND firstname < 'Vera';. An OR is fine in most parts of an SQL query: if it is not used to filter out rows from your query result, it will have no negative effect on query performance. So if your OR appears in a CASE expression in the SELECT list, don’t worry. Unfortunately you usually find the OR where it hurts: in the WHERE clause.
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