SQL : PostgreSQL add EXCLUDE constraint on alter table

SQL : PostgreSQL add EXCLUDE constraint on alter table

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SQL : How can I use a Postgres EXCLUDE constraint to prevent inserting two primary rows?
SQL : How can I use a Postgres EXCLUDE constraint to prevent inserting two primary rows?
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SQL : How can I use a Postgres EXCLUDE constraint to prevent inserting two primary rows?

SQL : How can I use a Postgres EXCLUDE constraint to prevent inserting two primary rows?
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